12571624621 has 2 divisors, whose sum is σ = 12571624622. Its totient is φ = 12571624620.

The previous prime is 12571624591. The next prime is 12571624651. The reversal of 12571624621 is 12642617521.

It is a balanced prime because it is at equal distance from previous prime (12571624591) and next prime (12571624651).

It can be written as a sum of positive squares in only one way, i.e., 7976276100 + 4595348521 = 89310^2 + 67789^2 .

It is a cyclic number.

It is not a de Polignac number, because 12571624621 - 2¹¹ = 12571622573 is a prime.

It is a super-2 number, since 2×12571624621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12571624651) 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 as a sum of consecutive naturals, namely, 6285812310 + 6285812311.

It is an arithmetic number, because the mean of its divisors is an integer number (6285812311).

Almost surely, 2^12571624621 is an apocalyptic number.

It is an amenable number.

12571624621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12571624621 is an equidigital number, since it uses as much as digits as its factorization.

12571624621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The spelling of 12571624621 in words is "twelve billion, five hundred seventy-one million, six hundred twenty-four thousand, six hundred twenty-one".