123232023521 has 2 divisors, whose sum is σ = 123232023522. Its totient is φ = 123232023520.

The previous prime is 123232023493. The next prime is 123232023557. The reversal of 123232023521 is 125320232321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119660646400 + 3571377121 = 345920^2 + 59761^2 .

It is a cyclic number.

It is not a de Polignac number, because 123232023521 - 2²⁶ = 123164914657 is a prime.

It is a super-2 number, since 2×123232023521² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123232023581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61616011760 + 61616011761.

It is an arithmetic number, because the mean of its divisors is an integer number (61616011761).

Almost surely, 2^123232023521 is an apocalyptic number.

It is an amenable number.

123232023521 is a deficient number, since it is larger than the sum of its proper divisors (1).

123232023521 is an equidigital number, since it uses as much as digits as its factorization.

123232023521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 123232023521 its reverse (125320232321), we get a palindrome (248552255842).

The spelling of 123232023521 in words is "one hundred twenty-three billion, two hundred thirty-two million, twenty-three thousand, five hundred twenty-one".