21311300104 has 16 divisors (see below), whose sum is σ = 40002757200. Its totient is φ = 10643898192.

The previous prime is 21311300081. The next prime is 21311300107. The reversal of 21311300104 is 40100311312.

It is not an unprimeable number, because it can be changed into a prime (21311300107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1461274 + ... + 1475785.

It is an arithmetic number, because the mean of its divisors is an integer number (2500172325).

Almost surely, 2^21311300104 is an apocalyptic number.

It is an amenable number.

21311300104 is a deficient number, since it is larger than the sum of its proper divisors (18691457096).

21311300104 is a wasteful number, since it uses less digits than its factorization.

21311300104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937972 (or 2937968 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21311300104 its reverse (40100311312), we get a palindrome (61411611416).

The spelling of 21311300104 in words is "twenty-one billion, three hundred eleven million, three hundred thousand, one hundred four".