4021422991722 has 128 divisors (see below), whose sum is σ = 9067239014400. Its totient is φ = 1321013599488.

The previous prime is 4021422991721. The next prime is 4021422991741. The reversal of 4021422991722 is 2271992241204.

4021422991722 is a `hidden beast` number, since 40 + 214 + 229 + 9 + 172 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (4021422991721) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 927233938 + ... + 927238274.

It is an arithmetic number, because the mean of its divisors is an integer number (70837804800).

Almost surely, 2^{4021422991722} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021422991722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4533619507200).

4021422991722 is an abundant number, since it is smaller than the sum of its proper divisors (5045816022678).

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

4021422991722 is a wasteful number, since it uses less digits than its factorization.

4021422991722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5257 (or 5251 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 4021422991722 in words is "four trillion, twenty-one billion, four hundred twenty-two million, nine hundred ninety-one thousand, seven hundred twenty-two".