31232011121 has 8 divisors (see below), whose sum is σ = 34305184320. Its totient is φ = 28301776272.

The previous prime is 31232011093. The next prime is 31232011157. The reversal of 31232011121 is 12111023213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31232011121 - 2³⁴ = 14052141937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31232011121.

It is not an unprimeable number, because it can be changed into a prime (31232011171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35734130 + ... + 35735003.

It is an arithmetic number, because the mean of its divisors is an integer number (4288148040).

Almost surely, 2^31232011121 is an apocalyptic number.

It is an amenable number.

31232011121 is a deficient number, since it is larger than the sum of its proper divisors (3073173199).

31232011121 is a wasteful number, since it uses less digits than its factorization.

31232011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71469175.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31232011121 its reverse (12111023213), we get a palindrome (43343034334).

The spelling of 31232011121 in words is "thirty-one billion, two hundred thirty-two million, eleven thousand, one hundred twenty-one".