22222120440020 has 12 divisors (see below), whose sum is σ = 46666452924084. Its totient is φ = 8888848176000.

The previous prime is 22222120439993. The next prime is 22222120440029. The reversal of 22222120440020 is 2004402122222.

It can be written as a sum of positive squares in 2 ways, for example, as 15694892575684 + 6527227864336 = 3961678^2 + 2554844^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222120440029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555553010981 + ... + 555553011020.

It is an arithmetic number, because the mean of its divisors is an integer number (3888871077007).

Almost surely, 2^{22222120440020} is an apocalyptic number.

22222120440020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222120440020 is an abundant number, since it is smaller than the sum of its proper divisors (24444332484064).

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

22222120440020 is a wasteful number, since it uses less digits than its factorization.

22222120440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111106022010 (or 1111106022008 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 22222120440020 its reverse (2004402122222), we get a palindrome (24226522562242).

The spelling of 22222120440020 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty million, four hundred forty thousand, twenty".