31025552124221 has 2 divisors, whose sum is σ = 31025552124222. Its totient is φ = 31025552124220.

The previous prime is 31025552124211. The next prime is 31025552124253. The reversal of 31025552124221 is 12242125552013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21297172792996 + 9728379331225 = 4614886^2 + 3119035^2 .

It is a cyclic number.

It is not a de Polignac number, because 31025552124221 - 2¹⁸ = 31025551862077 is a prime.

It is a super-2 number, since 2×31025552124221² (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 (31025552124211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15512776062110 + 15512776062111.

It is an arithmetic number, because the mean of its divisors is an integer number (15512776062111).

Almost surely, 2^{31025552124221} is an apocalyptic number.

It is an amenable number.

31025552124221 is a deficient number, since it is larger than the sum of its proper divisors (1).

31025552124221 is an equidigital number, since it uses as much as digits as its factorization.

31025552124221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 31025552124221 its reverse (12242125552013), we get a palindrome (43267677676234).

The spelling of 31025552124221 in words is "thirty-one trillion, twenty-five billion, five hundred fifty-two million, one hundred twenty-four thousand, two hundred twenty-one".