211121020021100 has 36 divisors (see below), whose sum is σ = 523580129654064. Its totient is φ = 72384349721280.

The previous prime is 211121020021049. The next prime is 211121020021103. The reversal of 211121020021100 is 1120020121112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (211121020021103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150800727887 + ... + 150800729286.

Almost surely, 2^{211121020021100} is an apocalyptic number.

211121020021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121020021100 is an abundant number, since it is smaller than the sum of its proper divisors (312459109632964).

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

211121020021100 is a wasteful number, since it uses less digits than its factorization.

211121020021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301601457194 (or 301601457187 counting only the distinct ones).

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

Adding to 211121020021100 its reverse (1120020121112), we get a palindrome (212241040142212).

The spelling of 211121020021100 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, twenty-one thousand, one hundred".