22021238021772 has 24 divisors (see below), whose sum is σ = 56054060419392. Its totient is φ = 6673102430800.

The previous prime is 22021238021767. The next prime is 22021238021779. The reversal of 22021238021772 is 27712083212022.

It is a self number, because there is not a number n which added to its sum of digits gives 22021238021772.

It is not an unprimeable number, because it can be changed into a prime (22021238021779) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 83413780254 + ... + 83413780517.

It is an arithmetic number, because the mean of its divisors is an integer number (2335585850808).

Almost surely, 2^{22021238021772} is an apocalyptic number.

22021238021772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22021238021772 is an abundant number, since it is smaller than the sum of its proper divisors (34032822397620).

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

22021238021772 is a wasteful number, since it uses less digits than its factorization.

22021238021772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166827560789 (or 166827560787 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The spelling of 22021238021772 in words is "twenty-two trillion, twenty-one billion, two hundred thirty-eight million, twenty-one thousand, seven hundred seventy-two".