100021212312 has 64 divisors (see below), whose sum is σ = 285916849920. Its totient is φ = 28563293568.

The previous prime is 100021212311. The next prime is 100021212353. The reversal of 100021212312 is 213212120001.

It is a junction number, because it is equal to n+sod(n) for n = 100021212291 and 100021212300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021212311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193678 + ... + 487394.

It is an arithmetic number, because the mean of its divisors is an integer number (4467450780).

Almost surely, 2^100021212312 is an apocalyptic number.

100021212312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100021212312 is an abundant number, since it is smaller than the sum of its proper divisors (185895637608).

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

100021212312 is a wasteful number, since it uses less digits than its factorization.

100021212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295760 (or 295756 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 100021212312 its reverse (213212120001), we get a palindrome (313233332313).

The spelling of 100021212312 in words is "one hundred billion, twenty-one million, two hundred twelve thousand, three hundred twelve".