212121012202120 has 128 divisors (see below), whose sum is σ = 576966266749440. Its totient is φ = 68612204390400.

The previous prime is 212121012202087. The next prime is 212121012202129. The reversal of 212121012202120 is 21202210121212.

It is a super-3 number, since 3×212121012202120³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121012202129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225132931 + ... + 226073170.

It is an arithmetic number, because the mean of its divisors is an integer number (4507548958980).

Almost surely, 2^{212121012202120} is an apocalyptic number.

212121012202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121012202120 is an abundant number, since it is smaller than the sum of its proper divisors (364845254547320).

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

212121012202120 is a wasteful number, since it uses less digits than its factorization.

212121012202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451206215 (or 451206211 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212121012202120 its reverse (21202210121212), we get a palindrome (233323222323332).

The spelling of 212121012202120 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve million, two hundred two thousand, one hundred twenty".