21230312108 has 12 divisors (see below), whose sum is σ = 37316717592. Its totient is φ = 10568392800.

The previous prime is 21230312107. The next prime is 21230312209. The reversal of 21230312108 is 80121303212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21230312101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11689793 + ... + 11691608.

It is an arithmetic number, because the mean of its divisors is an integer number (3109726466).

Almost surely, 2^21230312108 is an apocalyptic number.

It is an amenable number.

21230312108 is a deficient number, since it is larger than the sum of its proper divisors (16086405484).

21230312108 is a wasteful number, since it uses less digits than its factorization.

21230312108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23381632 (or 23381630 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 21230312108 in words is "twenty-one billion, two hundred thirty million, three hundred twelve thousand, one hundred eight".