10156271221 has 8 divisors (see below), whose sum is σ = 10507807800. Its totient is φ = 9804822720.

The previous prime is 10156271173. The next prime is 10156271239. The reversal of 10156271221 is 12217265101.

It can be written as a sum of positive squares in 4 ways, for example, as 1472640625 + 8683630596 = 38375^2 + 93186^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10156271221 is a prime.

It is a super-2 number, since 2×10156271221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10156271221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10156272221) 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 7 ways as a sum of consecutive naturals, for example, 285651 + ... + 319231.

It is an arithmetic number, because the mean of its divisors is an integer number (1313475975).

Almost surely, 2^10156271221 is an apocalyptic number.

It is an amenable number.

10156271221 is a deficient number, since it is larger than the sum of its proper divisors (351536579).

10156271221 is a wasteful number, since it uses less digits than its factorization.

10156271221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44039.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 10156271221 in words is "ten billion, one hundred fifty-six million, two hundred seventy-one thousand, two hundred twenty-one".