21331310104 has 16 divisors (see below), whose sum is σ = 43072837920. Its totient is φ = 9845220000.

The previous prime is 21331310101. The next prime is 21331310107. The reversal of 21331310104 is 40101313312.

It is an interprime number because it is at equal distance from previous prime (21331310101) and next prime (21331310107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331310101) 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, 102554272 + ... + 102554479.

It is an arithmetic number, because the mean of its divisors is an integer number (2692052370).

Almost surely, 2^21331310104 is an apocalyptic number.

It is an amenable number.

21331310104 is an abundant number, since it is smaller than the sum of its proper divisors (21741527816).

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

21331310104 is a wasteful number, since it uses less digits than its factorization.

21331310104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205108770 (or 205108766 counting only the distinct ones).

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

Adding to 21331310104 its reverse (40101313312), we get a palindrome (61432623416).

The spelling of 21331310104 in words is "twenty-one billion, three hundred thirty-one million, three hundred ten thousand, one hundred four".