202102011221100 has 72 divisors (see below), whose sum is σ = 586922272226640. Its totient is φ = 53693520679680.

The previous prime is 202102011221053. The next prime is 202102011221129. The reversal of 202102011221100 is 1122110201202.

It is a super-2 number, since 2×202102011221100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 202102011221100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1252100287 + ... + 1252261686.

It is an arithmetic number, because the mean of its divisors is an integer number (8151698225370).

Almost surely, 2^{202102011221100} is an apocalyptic number.

202102011221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102011221100 is an abundant number, since it is smaller than the sum of its proper divisors (384820261005540).

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

202102011221100 is a wasteful number, since it uses less digits than its factorization.

202102011221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504362259 (or 2504362252 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202102011221100 its reverse (1122110201202), we get a palindrome (203224121422302).

The spelling of 202102011221100 in words is "two hundred two trillion, one hundred two billion, eleven million, two hundred twenty-one thousand, one hundred".