100021012312 has 32 divisors (see below), whose sum is σ = 203853056400. Its totient is φ = 45732104064.

The previous prime is 100021012297. The next prime is 100021012313. The reversal of 100021012312 is 213210120001.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 100021012292 and 100021012301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021012313) 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, 4482987 + ... + 4505242.

Almost surely, 2^100021012312 is an apocalyptic number.

It is an amenable number.

100021012312 is an abundant number, since it is smaller than the sum of its proper divisors (103832044088).

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

100021012312 is a wasteful number, since it uses less digits than its factorization.

100021012312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8988355 (or 8988351 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100021012312 its reverse (213210120001), we get a palindrome (313231132313).

The spelling of 100021012312 in words is "one hundred billion, twenty-one million, twelve thousand, three hundred twelve".