21022001121100 has 36 divisors (see below), whose sum is σ = 52134562782064. Its totient is φ = 7207543241280.

The previous prime is 21022001121067. The next prime is 21022001121109. The reversal of 21022001121100 is 112110022012.

21022001121100 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21022001121100² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022001121109) 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, 15015714387 + ... + 15015715786.

Almost surely, 2^{21022001121100} is an apocalyptic number.

21022001121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022001121100 is an abundant number, since it is smaller than the sum of its proper divisors (31112561660964).

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

21022001121100 is a wasteful number, since it uses less digits than its factorization.

21022001121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30031430194 (or 30031430187 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022001121100 its reverse (112110022012), we get a palindrome (21134111143112).

The spelling of 21022001121100 in words is "twenty-one trillion, twenty-two billion, one million, one hundred twenty-one thousand, one hundred".