31312232213100 has 144 divisors (see below), whose sum is σ = 93049274131968. Its totient is φ = 8123906568960.

The previous prime is 31312232213071. The next prime is 31312232213111. The reversal of 31312232213100 is 131223221313.

It is a super-2 number, since 2×31312232213100² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 350349019 + ... + 350438381.

Almost surely, 2^{31312232213100} is an apocalyptic number.

31312232213100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31312232213100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46524637065984).

31312232213100 is an abundant number, since it is smaller than the sum of its proper divisors (61737041918868).

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

31312232213100 is a wasteful number, since it uses less digits than its factorization.

31312232213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120984 (or 120977 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31312232213100 its reverse (131223221313), we get a palindrome (31443455434413).

The spelling of 31312232213100 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty-two million, two hundred thirteen thousand, one hundred".