21313011010100 has 36 divisors (see below), whose sum is σ = 46249448700000. Its totient is φ = 8525164808160.

The previous prime is 21313011010087. The next prime is 21313011010103. The reversal of 21313011010100 is 101011031312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313011010103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31313201 + ... + 31986599.

Almost surely, 2^{21313011010100} is an apocalyptic number.

21313011010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21313011010100 is an abundant number, since it is smaller than the sum of its proper divisors (24936437689900).

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

21313011010100 is a wasteful number, since it uses less digits than its factorization.

21313011010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989912 (or 989905 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21313011010100 its reverse (101011031312), we get a palindrome (21414022041412).

The spelling of 21313011010100 in words is "twenty-one trillion, three hundred thirteen billion, eleven million, ten thousand, one hundred".