21113200102100 has 36 divisors (see below), whose sum is σ = 45816030607200. Its totient is φ = 8445208817760.

The previous prime is 21113200102097. The next prime is 21113200102201. The reversal of 21113200102100 is 120100231112.

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 11 ways as a sum of consecutive naturals, for example, 11947481 + ... + 13600319.

Almost surely, 2^{21113200102100} is an apocalyptic number.

21113200102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113200102100 is an abundant number, since it is smaller than the sum of its proper divisors (24702830505100).

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

21113200102100 is a wasteful number, since it uses less digits than its factorization.

21113200102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780592 (or 1780585 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21113200102100 its reverse (120100231112), we get a palindrome (21233300333212).

The spelling of 21113200102100 in words is "twenty-one trillion, one hundred thirteen billion, two hundred million, one hundred two thousand, one hundred".