231020122321331 has 32 divisors (see below), whose sum is σ = 271348778308608. Its totient is φ = 192563494179840.

The previous prime is 231020122321297. The next prime is 231020122321369. The reversal of 231020122321331 is 133123221020132.

It is not a de Polignac number, because 231020122321331 - 2¹⁰ = 231020122320307 is a prime.

It is a super-2 number, since 2×231020122321331² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231020122321331.

It is not an unprimeable number, because it can be changed into a prime (231020122321381) 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, 751040795 + ... + 751348331.

It is an arithmetic number, because the mean of its divisors is an integer number (8479649322144).

Almost surely, 2^{231020122321331} is an apocalyptic number.

231020122321331 is a deficient number, since it is larger than the sum of its proper divisors (40328655987277).

231020122321331 is a wasteful number, since it uses less digits than its factorization.

231020122321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318531.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 231020122321331 its reverse (133123221020132), we get a palindrome (364143343341463).

The spelling of 231020122321331 in words is "two hundred thirty-one trillion, twenty billion, one hundred twenty-two million, three hundred twenty-one thousand, three hundred thirty-one".