212320312100 has 72 divisors (see below), whose sum is σ = 499798380648. Its totient is φ = 77822899200.

The previous prime is 212320312079. The next prime is 212320312147. The reversal of 212320312100 is 1213023212.

It can be written as a sum of positive squares in 12 ways, for example, as 59403337984 + 152916974116 = 243728^2 + 391046^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 417971 + ... + 774170.

Almost surely, 2^212320312100 is an apocalyptic number.

212320312100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212320312100 is an abundant number, since it is smaller than the sum of its proper divisors (287478068548).

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

212320312100 is a wasteful number, since it uses less digits than its factorization.

212320312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192305 (or 1192298 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212320312100 its reverse (1213023212), we get a palindrome (213533335312).

The spelling of 212320312100 in words is "two hundred twelve billion, three hundred twenty million, three hundred twelve thousand, one hundred".