21202222210100 has 36 divisors (see below), whose sum is σ = 46009066147968. Its totient is φ = 8480843916000.

The previous prime is 21202222210069. The next prime is 21202222210123. The reversal of 21202222210100 is 101222220212.

It is a happy number.

21202222210100 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-3 number, since 3×21202222210100³ (a number of 41 digits) contains 333 as substring.

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, 23528855 + ... + 24413345.

Almost surely, 2^{21202222210100} is an apocalyptic number.

21202222210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202222210100 is an abundant number, since it is smaller than the sum of its proper divisors (24806843937868).

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

21202222210100 is a wasteful number, since it uses less digits than its factorization.

21202222210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124216 (or 1124209 counting only the distinct ones).

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

Adding to 21202222210100 its reverse (101222220212), we get a palindrome (21303444430312).

The spelling of 21202222210100 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, two hundred ten thousand, one hundred".