21311230320100 has 36 divisors (see below), whose sum is σ = 52851851195584. Its totient is φ = 7306707538080.

The previous prime is 21311230320067. The next prime is 21311230320101. The reversal of 21311230320100 is 102303211312.

It is not an unprimeable number, because it can be changed into a prime (21311230320101) 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, 15222306672 + ... + 15222308071.

Almost surely, 2^{21311230320100} is an apocalyptic number.

21311230320100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311230320100 is an abundant number, since it is smaller than the sum of its proper divisors (31540620875484).

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

21311230320100 is a wasteful number, since it uses less digits than its factorization.

21311230320100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30444614764 (or 30444614757 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21311230320100 its reverse (102303211312), we get a palindrome (21413533531412).

The spelling of 21311230320100 in words is "twenty-one trillion, three hundred eleven billion, two hundred thirty million, three hundred twenty thousand, one hundred".