231132121022 has 16 divisors (see below), whose sum is σ = 378815612544. Its totient is φ = 104893551000.

The previous prime is 231132121013. The next prime is 231132121027. The reversal of 231132121022 is 220121231132.

It is a junction number, because it is equal to n+sod(n) for n = 231132120985 and 231132121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231132121027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8311004 + ... + 8338767.

It is an arithmetic number, because the mean of its divisors is an integer number (23675975784).

Almost surely, 2^231132121022 is an apocalyptic number.

231132121022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231132121022 is a deficient number, since it is larger than the sum of its proper divisors (147683491522).

231132121022 is a wasteful number, since it uses less digits than its factorization.

231132121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650415.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231132121022 its reverse (220121231132), we get a palindrome (451253352154).

The spelling of 231132121022 in words is "two hundred thirty-one billion, one hundred thirty-two million, one hundred twenty-one thousand, twenty-two".