21222312021984 has 48 divisors (see below), whose sum is σ = 55738504276560. Its totient is φ = 7070302709760.

The previous prime is 21222312021971. The next prime is 21222312022007. The reversal of 21222312021984 is 48912021322212.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×21222312021984² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59215689 + ... + 59573000.

It is an arithmetic number, because the mean of its divisors is an integer number (1161218839095).

Almost surely, 2^{21222312021984} is an apocalyptic number.

21222312021984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21222312021984 is an abundant number, since it is smaller than the sum of its proper divisors (34516192254576).

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

21222312021984 is a wasteful number, since it uses less digits than its factorization.

21222312021984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118790563 (or 118790555 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 21222312021984 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twelve million, twenty-one thousand, nine hundred eighty-four".