21222103312032 has 96 divisors (see below), whose sum is σ = 63669411735552. Its totient is φ = 6063162680064.

The previous prime is 21222103312027. The next prime is 21222103312037. The reversal of 21222103312032 is 23021330122212.

It is an interprime number because it is at equal distance from previous prime (21222103312027) and next prime (21222103312037).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21222103311993 and 21222103312011.

It is not an unprimeable number, because it can be changed into a prime (21222103312037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13223413 + ... + 14741195.

It is an arithmetic number, because the mean of its divisors is an integer number (663223038912).

Almost surely, 2^{21222103312032} is an apocalyptic number.

It is an amenable number.

21222103312032 is an abundant number, since it is smaller than the sum of its proper divisors (42447308423520).

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

21222103312032 is a wasteful number, since it uses less digits than its factorization.

21222103312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538610 (or 1538602 counting only the distinct ones).

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

Adding to 21222103312032 its reverse (23021330122212), we get a palindrome (44243433434244).

The spelling of 21222103312032 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred three million, three hundred twelve thousand, thirty-two".