31233001221231 has 16 divisors (see below), whose sum is σ = 42711168363360. Its totient is φ = 20289642670080.

The previous prime is 31233001221151. The next prime is 31233001221259. The reversal of 31233001221231 is 13212210033213.

It is not a de Polignac number, because 31233001221231 - 2⁹ = 31233001220719 is a prime.

It is a super-2 number, since 2×31233001221231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233001221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153050530 + ... + 153254463.

It is an arithmetic number, because the mean of its divisors is an integer number (2669448022710).

Almost surely, 2^{31233001221231} is an apocalyptic number.

31233001221231 is a deficient number, since it is larger than the sum of its proper divisors (11478167142129).

31233001221231 is a wasteful number, since it uses less digits than its factorization.

31233001221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306305866.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31233001221231 its reverse (13212210033213), we get a palindrome (44445211254444).

The spelling of 31233001221231 in words is "thirty-one trillion, two hundred thirty-three billion, one million, two hundred twenty-one thousand, two hundred thirty-one".