21321322302012 has 12 divisors (see below), whose sum is σ = 49749752038056. Its totient is φ = 7107107434000.

The previous prime is 21321322302011. The next prime is 21321322302041. The reversal of 21321322302012 is 21020322312312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321322302011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888388429239 + ... + 888388429262.

It is an arithmetic number, because the mean of its divisors is an integer number (4145812669838).

Almost surely, 2^{21321322302012} is an apocalyptic number.

It is an amenable number.

21321322302012 is an abundant number, since it is smaller than the sum of its proper divisors (28428429736044).

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

21321322302012 is a wasteful number, since it uses less digits than its factorization.

21321322302012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776776858508 (or 1776776858506 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21321322302012 its reverse (21020322312312), we get a palindrome (42341644614324).

The spelling of 21321322302012 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twenty-two million, three hundred two thousand, twelve".