32121042452581 has 2 divisors, whose sum is σ = 32121042452582. Its totient is φ = 32121042452580.

The previous prime is 32121042452533. The next prime is 32121042452621. The reversal of 32121042452581 is 18525424012123.

It is an a-pointer prime, because the next prime (32121042452621) can be obtained adding 32121042452581 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31590863330625 + 530179121956 = 5620575^2 + 728134^2 .

It is a cyclic number.

It is not a de Polignac number, because 32121042452581 - 2¹⁷ = 32121042321509 is a prime.

It is a super-2 number, since 2×32121042452581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32121042152581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16060521226290 + 16060521226291.

It is an arithmetic number, because the mean of its divisors is an integer number (16060521226291).

Almost surely, 2^{32121042452581} is an apocalyptic number.

It is an amenable number.

32121042452581 is a deficient number, since it is larger than the sum of its proper divisors (1).

32121042452581 is an equidigital number, since it uses as much as digits as its factorization.

32121042452581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 32121042452581 in words is "thirty-two trillion, one hundred twenty-one billion, forty-two million, four hundred fifty-two thousand, five hundred eighty-one".