201021220222100 has 36 divisors (see below), whose sum is σ = 436242080282400. Its totient is φ = 80403689489760.

The previous prime is 201021220222073. The next prime is 201021220222117. The reversal of 201021220222100 is 1222022120102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58298210 + ... + 61650009.

It is an arithmetic number, because the mean of its divisors is an integer number (12117835563400).

Almost surely, 2^{201021220222100} is an apocalyptic number.

201021220222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021220222100 is an abundant number, since it is smaller than the sum of its proper divisors (235220860060300).

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

201021220222100 is a wasteful number, since it uses less digits than its factorization.

201021220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119964992 (or 119964985 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201021220222100 its reverse (1222022120102), we get a palindrome (202243242342202).

The spelling of 201021220222100 in words is "two hundred one trillion, twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".