201121120021100 has 36 divisors (see below), whose sum is σ = 436455910362024. Its totient is φ = 80444193646080.

The previous prime is 201121120021067. The next prime is 201121120021121. The reversal of 201121120021100 is 1120021121102.

It is a super-2 number, since 2×201121120021100² (a number of 29 digits) contains 22 as substring.

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, 51278774 + ... + 55061373.

It is an arithmetic number, because the mean of its divisors is an integer number (12123775287834).

Almost surely, 2^{201121120021100} is an apocalyptic number.

201121120021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121120021100 is an abundant number, since it is smaller than the sum of its proper divisors (235334790340924).

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

201121120021100 is a wasteful number, since it uses less digits than its factorization.

201121120021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106359074 (or 106359067 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201121120021100 its reverse (1120021121102), we get a palindrome (202241141142202).

The spelling of 201121120021100 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred".