212121320120 has 32 divisors (see below), whose sum is σ = 493730661600. Its totient is φ = 81922716288.

The previous prime is 212121320107. The next prime is 212121320141. The reversal of 212121320120 is 21023121212.

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, 91430444 + ... + 91432763.

It is an arithmetic number, because the mean of its divisors is an integer number (15429083175).

Almost surely, 2^212121320120 is an apocalyptic number.

212121320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121320120 is an abundant number, since it is smaller than the sum of its proper divisors (281609341480).

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

212121320120 is a wasteful number, since it uses less digits than its factorization.

212121320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182863247 (or 182863243 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212121320120 its reverse (21023121212), we get a palindrome (233144441332).

The spelling of 212121320120 in words is "two hundred twelve billion, one hundred twenty-one million, three hundred twenty thousand, one hundred twenty".