202120102120 has 16 divisors (see below), whose sum is σ = 454770229860. Its totient is φ = 80848040832.

The previous prime is 202120102049. The next prime is 202120102123. The reversal of 202120102120 is 21201021202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 202084413444 + 35688676 = 449538^2 + 5974^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202120102120.

It is not an unprimeable number, because it can be changed into a prime (202120102123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526501237 + ... + 2526501316.

Almost surely, 2^202120102120 is an apocalyptic number.

202120102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120102120 is an abundant number, since it is smaller than the sum of its proper divisors (252650127740).

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

202120102120 is a wasteful number, since it uses less digits than its factorization.

202120102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053002564 (or 5053002560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202120102120 its reverse (21201021202), we get a palindrome (223321123322).

The spelling of 202120102120 in words is "two hundred two billion, one hundred twenty million, one hundred two thousand, one hundred twenty".