1232542231521 has 16 divisors (see below), whose sum is σ = 1667833747200. Its totient is φ = 809518290048.

The previous prime is 1232542231499. The next prime is 1232542231541. The reversal of 1232542231521 is 1251322452321.

It is not a de Polignac number, because 1232542231521 - 2⁶ = 1232542231457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1232542231541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5581626 + ... + 5798243.

It is an arithmetic number, because the mean of its divisors is an integer number (104239609200).

Almost surely, 2^{1232542231521} is an apocalyptic number.

It is an amenable number.

1232542231521 is a deficient number, since it is larger than the sum of its proper divisors (435291515679).

1232542231521 is a wasteful number, since it uses less digits than its factorization.

1232542231521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11380408.

The product of its digits is 28800, while the sum is 33.

Adding to 1232542231521 its reverse (1251322452321), we get a palindrome (2483864683842).

The spelling of 1232542231521 in words is "one trillion, two hundred thirty-two billion, five hundred forty-two million, two hundred thirty-one thousand, five hundred twenty-one".