21310220012 has 12 divisors (see below), whose sum is σ = 38495881536. Its totient is φ = 10311396720.

The previous prime is 21310220003. The next prime is 21310220021. The reversal of 21310220012 is 21002201312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21310220003) and next prime (21310220021).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85928183 + ... + 85928430.

It is an arithmetic number, because the mean of its divisors is an integer number (3207990128).

Almost surely, 2^21310220012 is an apocalyptic number.

It is an amenable number.

21310220012 is a deficient number, since it is larger than the sum of its proper divisors (17185661524).

21310220012 is a wasteful number, since it uses less digits than its factorization.

21310220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171856648 (or 171856646 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21310220012 its reverse (21002201312), we get a palindrome (42312421324).

The spelling of 21310220012 in words is "twenty-one billion, three hundred ten million, two hundred twenty thousand, twelve".