21113203310100 has 216 divisors, whose sum is σ = 72593229465120. Its totient is φ = 5090073696000.

The previous prime is 21113203310083. The next prime is 21113203310123. The reversal of 21113203310100 is 101330231112.

21113203310100 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 320 + 331 + 0 + 10 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4099390 + ... + 7683189.

Almost surely, 2^{21113203310100} is an apocalyptic number.

21113203310100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113203310100 is an abundant number, since it is smaller than the sum of its proper divisors (51480026155020).

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

21113203310100 is a wasteful number, since it uses less digits than its factorization.

21113203310100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11782791 (or 11782781 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21113203310100 its reverse (101330231112), we get a palindrome (21214533541212).

The spelling of 21113203310100 in words is "twenty-one trillion, one hundred thirteen billion, two hundred three million, three hundred ten thousand, one hundred".