212021121212120 has 64 divisors (see below), whose sum is σ = 521272836633600. Its totient is φ = 76971573636480.

The previous prime is 212021121212119. The next prime is 212021121212209. The reversal of 212021121212120 is 21212121120212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212021121212092 and 212021121212101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396657290 + ... + 397191449.

It is an arithmetic number, because the mean of its divisors is an integer number (8144888072400).

Almost surely, 2^{212021121212120} is an apocalyptic number.

212021121212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021121212120 is an abundant number, since it is smaller than the sum of its proper divisors (309251715421480).

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

212021121212120 is a wasteful number, since it uses less digits than its factorization.

212021121212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793849368 (or 793849364 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212021121212120 its reverse (21212121120212), we get a palindrome (233233242332332).

The spelling of 212021121212120 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty".