21230312104 has 32 divisors (see below), whose sum is σ = 41588334720. Its totient is φ = 10141217856.

The previous prime is 21230312101. The next prime is 21230312107. The reversal of 21230312104 is 40121303212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21230312101) and next prime (21230312107).

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81334 + ... + 221530.

It is an arithmetic number, because the mean of its divisors is an integer number (1299635460).

Almost surely, 2^21230312104 is an apocalyptic number.

It is an amenable number.

21230312104 is a deficient number, since it is larger than the sum of its proper divisors (20358022616).

21230312104 is a wasteful number, since it uses less digits than its factorization.

21230312104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141049 (or 141045 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21230312104 its reverse (40121303212), we get a palindrome (61351615316).

The spelling of 21230312104 in words is "twenty-one billion, two hundred thirty million, three hundred twelve thousand, one hundred four".