1232121023539 has 40 divisors (see below), whose sum is σ = 1571037787008. Its totient is φ = 961915127040.

The previous prime is 1232121023533. The next prime is 1232121023633. The reversal of 1232121023539 is 9353201212321.

It is not a de Polignac number, because 1232121023539 - 2⁷ = 1232121023411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232121023533) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 778449 + ... + 1752205.

Almost surely, 2^{1232121023539} is an apocalyptic number.

1232121023539 is a deficient number, since it is larger than the sum of its proper divisors (338916763469).

1232121023539 is an frugal number, since it uses more digits than its factorization.

1232121023539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973833 (or 973812 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 1232121023539 in words is "one trillion, two hundred thirty-two billion, one hundred twenty-one million, twenty-three thousand, five hundred thirty-nine".