202120012120 has 64 divisors (see below), whose sum is σ = 490200167520. Its totient is φ = 74560687104.

The previous prime is 202120012117. The next prime is 202120012219. The reversal of 202120012120 is 21210021202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 202120012120.

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, 393279 + ... + 747601.

Almost surely, 2^202120012120 is an apocalyptic number.

202120012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202120012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245100083760).

202120012120 is an abundant number, since it is smaller than the sum of its proper divisors (288080155400).

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

202120012120 is a wasteful number, since it uses less digits than its factorization.

202120012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355444 (or 355440 counting only the distinct ones).

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

Adding to 202120012120 its reverse (21210021202), we get a palindrome (223330033322).

The spelling of 202120012120 in words is "two hundred two billion, one hundred twenty million, twelve thousand, one hundred twenty".