22221220220020 has 48 divisors (see below), whose sum is σ = 47927464478208. Its totient is φ = 8647952342400.

The previous prime is 22221220220011. The next prime is 22221220220021. The reversal of 22221220220020 is 2002202212222.

It is a self number, because there is not a number n which added to its sum of digits gives 22221220220020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221220220021) 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, 20959695 + ... + 21994345.

It is an arithmetic number, because the mean of its divisors is an integer number (998488843296).

Almost surely, 2^{22221220220020} is an apocalyptic number.

22221220220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221220220020 is an abundant number, since it is smaller than the sum of its proper divisors (25706244258188).

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

22221220220020 is a wasteful number, since it uses less digits than its factorization.

22221220220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063720 (or 1063718 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 22221220220020 its reverse (2002202212222), we get a palindrome (24223422432242).

It can be divided in two parts, 222212202 and 20020, that added together give a palindrome (222232222).

The spelling of 22221220220020 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, twenty".