202121022120120 has 96 divisors (see below), whose sum is σ = 672915110278320. Its totient is φ = 52584330954240.

The previous prime is 202121022120077. The next prime is 202121022120137. The reversal of 202121022120120 is 21021220121202.

It is a happy number.

202121022120120 is a `hidden beast` number, since 2 + 0 + 212 + 10 + 221 + 201 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202121022120093 and 202121022120102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6846903334 + ... + 6846932853.

Almost surely, 2^{202121022120120} is an apocalyptic number.

202121022120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121022120120 is an abundant number, since it is smaller than the sum of its proper divisors (470794088158200).

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

202121022120120 is a wasteful number, since it uses less digits than its factorization.

202121022120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13693836245 (or 13693836238 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202121022120120 its reverse (21021220121202), we get a palindrome (223142242241322).

The spelling of 202121022120120 in words is "two hundred two trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred twenty".