31231120323222 has 24 divisors (see below), whose sum is σ = 67673734750440. Its totient is φ = 10409403074400.

The previous prime is 31231120323197. The next prime is 31231120323239. The reversal of 31231120323222 is 22232302113213.

31231120323222 is a `hidden beast` number, since 3 + 1 + 2 + 3 + 112 + 0 + 323 + 222 = 666.

It is a super-2 number, since 2×31231120323222² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80665404 + ... + 81051647.

It is an arithmetic number, because the mean of its divisors is an integer number (2819738947935).

Almost surely, 2^{31231120323222} is an apocalyptic number.

31231120323222 is an abundant number, since it is smaller than the sum of its proper divisors (36442614427218).

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

31231120323222 is a wasteful number, since it uses less digits than its factorization.

31231120323222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161727788 (or 161727785 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31231120323222 its reverse (22232302113213), we get a palindrome (53463422436435).

The spelling of 31231120323222 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty million, three hundred twenty-three thousand, two hundred twenty-two".