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1220201221012 = 22643474417271
BaseRepresentation
bin10001110000011001101…
…010010000101110010100
311022122112220212110120021
4101300121222100232110
5124442433003033022
62332315214514524
7154104503151064
oct21603152205624
94278486773507
101220201221012
11430536862474
12178596b05a44
138b0ab886617
14430b542d3a4
1521b184527c7
hex11c19a90b94

1220201221012 has 12 divisors (see below), whose sum is σ = 2138673062176. Its totient is φ = 609151774680.

The previous prime is 1220201220989. The next prime is 1220201221049. The reversal of 1220201221012 is 2101221020221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237206064 + ... + 237211207.

Almost surely, 21220201221012 is an apocalyptic number.

It is an amenable number.

1220201221012 is a deficient number, since it is larger than the sum of its proper divisors (918471841164).

1220201221012 is a wasteful number, since it uses less digits than its factorization.

1220201221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474417918 (or 474417916 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220201221012 its reverse (2101221020221), we get a palindrome (3321422241233).

The spelling of 1220201221012 in words is "one trillion, two hundred twenty billion, two hundred one million, two hundred twenty-one thousand, twelve".

Divisors: 1 2 4 643 1286 2572 474417271 948834542 1897669084 305050305253 610100610506 1220201221012