212121323320 has 32 divisors (see below), whose sum is σ = 477289224720. Its totient is φ = 84845640960.

The previous prime is 212121323303. The next prime is 212121323371. The reversal of 212121323320 is 23323121212.

It is a junction number, because it is equal to n+sod(n) for n = 212121323291 and 212121323300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405444 + ... + 1549036.

Almost surely, 2^212121323320 is an apocalyptic number.

212121323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121323320 is an abundant number, since it is smaller than the sum of its proper divisors (265167901400).

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

212121323320 is a wasteful number, since it uses less digits than its factorization.

212121323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180535 (or 180531 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212121323320 its reverse (23323121212), we get a palindrome (235444444532).

The spelling of 212121323320 in words is "two hundred twelve billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred twenty".