2021012212120 has 64 divisors (see below), whose sum is σ = 5131723831200. Its totient is φ = 709571681280.

The previous prime is 2021012212099. The next prime is 2021012212159. The reversal of 2021012212120 is 212122101202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021012212094 and 2021012212103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79180509 + ... + 79206028.

Almost surely, 2^{2021012212120} is an apocalyptic number.

2021012212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021012212120 is an abundant number, since it is smaller than the sum of its proper divisors (3110711619080).

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

2021012212120 is a wasteful number, since it uses less digits than its factorization.

2021012212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158386588 (or 158386584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021012212120 its reverse (212122101202), we get a palindrome (2233134313322).

The spelling of 2021012212120 in words is "two trillion, twenty-one billion, twelve million, two hundred twelve thousand, one hundred twenty".