21022201021100 has 18 divisors (see below), whose sum is σ = 45618176216004. Its totient is φ = 8408880408400.

The previous prime is 21022201021051. The next prime is 21022201021153. The reversal of 21022201021100 is 112010222012.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105111005006 + ... + 105111005205.

Almost surely, 2^{21022201021100} is an apocalyptic number.

21022201021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022201021100 is an abundant number, since it is smaller than the sum of its proper divisors (24595975194904).

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

21022201021100 is a wasteful number, since it uses less digits than its factorization.

21022201021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210222010225 (or 210222010218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21022201021100 its reverse (112010222012), we get a palindrome (21134211243112).

The spelling of 21022201021100 in words is "twenty-one trillion, twenty-two billion, two hundred one million, twenty-one thousand, one hundred".