31121230233 has 32 divisors (see below), whose sum is σ = 42494284800. Its totient is φ = 20255718080.

The previous prime is 31121230207. The next prime is 31121230267. The reversal of 31121230233 is 33203212113.

It is a cyclic number.

It is not a de Polignac number, because 31121230233 - 2⁶ = 31121230169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31121220233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6263116 + ... + 6268082.

It is an arithmetic number, because the mean of its divisors is an integer number (1327946400).

Almost surely, 2^31121230233 is an apocalyptic number.

It is an amenable number.

31121230233 is a deficient number, since it is larger than the sum of its proper divisors (11373054567).

31121230233 is a wasteful number, since it uses less digits than its factorization.

31121230233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31121230233 its reverse (33203212113), we get a palindrome (64324442346).

The spelling of 31121230233 in words is "thirty-one billion, one hundred twenty-one million, two hundred thirty thousand, two hundred thirty-three".