21322312312 has 16 divisors (see below), whose sum is σ = 45690669360. Its totient is φ = 9138133824.

The previous prime is 21322312301. The next prime is 21322312331. The reversal of 21322312312 is 21321322312.

It is a congruent number.

It is an unprimeable number.

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, 190377733 + ... + 190377844.

It is an arithmetic number, because the mean of its divisors is an integer number (2855666835).

Almost surely, 2^21322312312 is an apocalyptic number.

It is an amenable number.

21322312312 is an abundant number, since it is smaller than the sum of its proper divisors (24368357048).

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

21322312312 is a wasteful number, since it uses less digits than its factorization.

21322312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380755590 (or 380755586 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21322312312 its reverse (21321322312), we get a palindrome (42643634624).

The spelling of 21322312312 in words is "twenty-one billion, three hundred twenty-two million, three hundred twelve thousand, three hundred twelve".