100023331212 has 144 divisors (see below), whose sum is σ = 299707017792. Its totient is φ = 27530150400.

The previous prime is 100023331157. The next prime is 100023331237. The reversal of 100023331212 is 212133320001.

100023331212 is a `hidden beast` number, since 100 + 0 + 23 + 331 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 888618 + ... + 994830.

Almost surely, 2^100023331212 is an apocalyptic number.

100023331212 is a gapful number since it is divisible by the number (12) 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 100023331212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149853508896).

100023331212 is an abundant number, since it is smaller than the sum of its proper divisors (199683686580).

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

100023331212 is a wasteful number, since it uses less digits than its factorization.

100023331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106368 (or 106363 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 100023331212 its reverse (212133320001), we get a palindrome (312156651213).

The spelling of 100023331212 in words is "one hundred billion, twenty-three million, three hundred thirty-one thousand, two hundred twelve".