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212011013221 = 736073839611
BaseRepresentation
bin1100010101110011010…
…1110101010001100101
3202021020102010101010221
43011130311311101211
511433144304410341
6241221351444341
721213554610160
oct3053465652145
9667212111127
10212011013221
1181a05765207
123510a0866b1
1316cb983b7a7
14a393368ad7
1557acb6ced1
hex315cd75465

212011013221 has 8 divisors (see below), whose sum is σ = 242305306304. Its totient is φ = 181718471520.

The previous prime is 212011013219. The next prime is 212011013257. The reversal of 212011013221 is 122310110212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212011013221 - 21 = 212011013219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011013195 and 212011013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011013261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167295 + ... + 672316.

It is an arithmetic number, because the mean of its divisors is an integer number (30288163288).

Almost surely, 2212011013221 is an apocalyptic number.

It is an amenable number.

212011013221 is a deficient number, since it is larger than the sum of its proper divisors (30294293083).

212011013221 is an equidigital number, since it uses as much as digits as its factorization.

212011013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875691.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212011013221 its reverse (122310110212), we get a palindrome (334321123433).

The spelling of 212011013221 in words is "two hundred twelve billion, eleven million, thirteen thousand, two hundred twenty-one".

Divisors: 1 7 36073 252511 839611 5877277 30287287603 212011013221