20231131122 has 12 divisors (see below), whose sum is σ = 43834117470. Its totient is φ = 6743710368.

The previous prime is 20231131121. The next prime is 20231131133. The reversal of 20231131122 is 22113113202.

20231131122 is a `hidden beast` number, since 20 + 2 + 311 + 311 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20201221161 + 29909961 = 142131^2 + 5469^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1123951729 = 20231131122 / (2 + 0 + 2 + 3 + 1 + 1 + 3 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20231131095 and 20231131104.

It is not an unprimeable number, because it can be changed into a prime (20231131121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561975847 + ... + 561975882.

Almost surely, 2^20231131122 is an apocalyptic number.

20231131122 is an abundant number, since it is smaller than the sum of its proper divisors (23602986348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20231131122 is a wasteful number, since it uses less digits than its factorization.

20231131122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123951737 (or 1123951734 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20231131122 its reverse (22113113202), we get a palindrome (42344244324).

The spelling of 20231131122 in words is "twenty billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred twenty-two".