233131312121 has 16 divisors (see below), whose sum is σ = 248043264000. Its totient is φ = 218493531648.

The previous prime is 233131312067. The next prime is 233131312123. The reversal of 233131312121 is 121213131332.

It is a cyclic number.

It is not a de Polignac number, because 233131312121 - 2³⁴ = 215951442937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233131312123) 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, 703721 + ... + 980553.

It is an arithmetic number, because the mean of its divisors is an integer number (15502704000).

Almost surely, 2^233131312121 is an apocalyptic number.

It is an amenable number.

233131312121 is a deficient number, since it is larger than the sum of its proper divisors (14911951879).

233131312121 is a wasteful number, since it uses less digits than its factorization.

233131312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277328.

The product of its digits is 648, while the sum is 23.

Adding to 233131312121 its reverse (121213131332), we get a palindrome (354344443453).

The spelling of 233131312121 in words is "two hundred thirty-three billion, one hundred thirty-one million, three hundred twelve thousand, one hundred twenty-one".