21312010030 has 16 divisors (see below), whose sum is σ = 38363866560. Its totient is φ = 8524304352.

The previous prime is 21312010021. The next prime is 21312010037. The reversal of 21312010030 is 3001021312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312010037) 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, 151627 + ... + 256153.

It is an arithmetic number, because the mean of its divisors is an integer number (2397741660).

Almost surely, 2^21312010030 is an apocalyptic number.

21312010030 is a deficient number, since it is larger than the sum of its proper divisors (17051856530).

21312010030 is a wasteful number, since it uses less digits than its factorization.

21312010030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124923.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21312010030 its reverse (3001021312), we get a palindrome (24313031342).

The spelling of 21312010030 in words is "twenty-one billion, three hundred twelve million, ten thousand, thirty".