21264035256131 has 16 divisors (see below), whose sum is σ = 22780033436160. Its totient is φ = 19811725856160.

The previous prime is 21264035256119. The next prime is 21264035256133. The reversal of 21264035256131 is 13165253046212.

It is a cyclic number.

It is not a de Polignac number, because 21264035256131 - 2⁶ = 21264035256067 is a prime.

It is a super-2 number, since 2×21264035256131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21264035256133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102620315 + ... + 102827316.

It is an arithmetic number, because the mean of its divisors is an integer number (1423752089760).

Almost surely, 2^{21264035256131} is an apocalyptic number.

21264035256131 is a deficient number, since it is larger than the sum of its proper divisors (1515998180029).

21264035256131 is a wasteful number, since it uses less digits than its factorization.

21264035256131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205447786.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21264035256131 in words is "twenty-one trillion, two hundred sixty-four billion, thirty-five million, two hundred fifty-six thousand, one hundred thirty-one".