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BaseRepresentation
bin10001011111100100000…
…011100011001001010101
311020220212221122110010122
4101133210003203021111
5124143421213324341
62320125222401325
7152564463333455
oct21374403431125
94226787573118
101202122011221
114238a959957a
12174b90290245
138948a111551
144227c2a3d65
152140b14e94b
hex117e40e3255

1202122011221 has 4 divisors (see below), whose sum is σ = 1202124421344. Its totient is φ = 1202119601100.

The previous prime is 1202122011191. The next prime is 1202122011271. The reversal of 1202122011221 is 1221102212021.

Adding to 1202122011221 its reverse (1221102212021), we get a palindrome (2423224223242).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1202122011221 - 210 = 1202122010197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202122011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202122011271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147545 + ... + 1557566.

It is an arithmetic number, because the mean of its divisors is an integer number (300531105336).

Almost surely, 21202122011221 is an apocalyptic number.

It is an amenable number.

1202122011221 is a deficient number, since it is larger than the sum of its proper divisors (2410123).

1202122011221 is an equidigital number, since it uses as much as digits as its factorization.

1202122011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410122.

The product of its (nonzero) digits is 64, while the sum is 17.

The spelling of 1202122011221 in words is "one trillion, two hundred two billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".

Divisors: 1 705011 1705111 1202122011221