21100030022100 has 72 divisors (see below), whose sum is σ = 64262547593440. Its totient is φ = 5330533898880.

The previous prime is 21100030022077. The next prime is 21100030022153. The reversal of 21100030022100 is 122003000112.

It is a super-2 number, since 2×21100030022100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1850874127 + ... + 1850885526.

Almost surely, 2^{21100030022100} is an apocalyptic number.

21100030022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100030022100 is an abundant number, since it is smaller than the sum of its proper divisors (43162517571340).

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

21100030022100 is a wasteful number, since it uses less digits than its factorization.

21100030022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701759689 (or 3701759682 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21100030022100 its reverse (122003000112), we get a palindrome (21222033022212).

The spelling of 21100030022100 in words is "twenty-one trillion, one hundred billion, thirty million, twenty-two thousand, one hundred".