21400222344312 has 128 divisors (see below), whose sum is σ = 64118353996800. Its totient is φ = 5822639520768.

The previous prime is 21400222344311. The next prime is 21400222344323. The reversal of 21400222344312 is 21344322200412.

It is a self number, because there is not a number n which added to its sum of digits gives 21400222344312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400222344311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29729908 + ... + 30441219.

It is an arithmetic number, because the mean of its divisors is an integer number (500924640600).

Almost surely, 2^{21400222344312} is an apocalyptic number.

It is an amenable number.

21400222344312 is an abundant number, since it is smaller than the sum of its proper divisors (42718131652488).

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

21400222344312 is a wasteful number, since it uses less digits than its factorization.

21400222344312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60171245 (or 60171241 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21400222344312 its reverse (21344322200412), we get a palindrome (42744544544724).

The spelling of 21400222344312 in words is "twenty-one trillion, four hundred billion, two hundred twenty-two million, three hundred forty-four thousand, three hundred twelve".