21133123232100 has 72 divisors (see below), whose sum is σ = 66703821703008. Its totient is φ = 5123181388800.

The previous prime is 21133123232099. The next prime is 21133123232161. The reversal of 21133123232100 is 123232133112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3201985069 + ... + 3201991668.

Almost surely, 2^{21133123232100} is an apocalyptic number.

21133123232100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133123232100 is an abundant number, since it is smaller than the sum of its proper divisors (45570698470908).

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

21133123232100 is a wasteful number, since it uses less digits than its factorization.

21133123232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403976765 (or 6403976758 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21133123232100 its reverse (123232133112), we get a palindrome (21256355365212).

The spelling of 21133123232100 in words is "twenty-one trillion, one hundred thirty-three billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred".