231121331131311 has 48 divisors (see below), whose sum is σ = 335653852165632. Its totient is φ = 153246462840000.

The previous prime is 231121331131303. The next prime is 231121331131393. The reversal of 231121331131311 is 113131133121132.

231121331131311 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 2 + 1 + 3 + 311 + 31 + 311 = 666.

231121331131311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231121331131311 - 2³ = 231121331131303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121331111311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10509803526 + ... + 10509825516.

It is an arithmetic number, because the mean of its divisors is an integer number (6992788586784).

Almost surely, 2^{231121331131311} is an apocalyptic number.

231121331131311 is a deficient number, since it is larger than the sum of its proper divisors (104532521034321).

231121331131311 is a wasteful number, since it uses less digits than its factorization.

231121331131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28724 (or 28721 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

Adding to 231121331131311 its reverse (113131133121132), we get a palindrome (344252464252443).

The spelling of 231121331131311 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, three hundred thirty-one million, one hundred thirty-one thousand, three hundred eleven".