202020122100 has 144 divisors (see below), whose sum is σ = 602237440448. Its totient is φ = 52247669760.

The previous prime is 202020122069. The next prime is 202020122119. The reversal of 202020122100 is 1221020202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3445227 + ... + 3503373.

Almost surely, 2^202020122100 is an apocalyptic number.

202020122100 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 202020122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301118720224).

202020122100 is an abundant number, since it is smaller than the sum of its proper divisors (400217318348).

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

202020122100 is a wasteful number, since it uses less digits than its factorization.

202020122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58514 (or 58507 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202020122100 its reverse (1221020202), we get a palindrome (203241142302).

The spelling of 202020122100 in words is "two hundred two billion, twenty million, one hundred twenty-two thousand, one hundred".