21311103132100 has 72 divisors (see below), whose sum is σ = 46804823049600. Its totient is φ = 8421276593280.

The previous prime is 21311103132073. The next prime is 21311103132101. The reversal of 21311103132100 is 123130111312.

It is not an unprimeable number, because it can be changed into a prime (21311103132101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179328501 + ... + 179447299.

It is an arithmetic number, because the mean of its divisors is an integer number (650066986800).

Almost surely, 2^{21311103132100} is an apocalyptic number.

21311103132100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311103132100 is an abundant number, since it is smaller than the sum of its proper divisors (25493719917500).

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

21311103132100 is a wasteful number, since it uses less digits than its factorization.

21311103132100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140509 (or 140502 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21311103132100 its reverse (123130111312), we get a palindrome (21434233243412).

The spelling of 21311103132100 in words is "twenty-one trillion, three hundred eleven billion, one hundred three million, one hundred thirty-two thousand, one hundred".