22101220221020 has 24 divisors (see below), whose sum is σ = 46481526181104. Its totient is φ = 8827352142336.

The previous prime is 22101220221007. The next prime is 22101220221049. The reversal of 22101220221020 is 2012202210122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22101220221020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820982834 + ... + 821009753.

It is an arithmetic number, because the mean of its divisors is an integer number (1936730257546).

Almost surely, 2^{22101220221020} is an apocalyptic number.

22101220221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101220221020 is an abundant number, since it is smaller than the sum of its proper divisors (24380305960084).

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

22101220221020 is a wasteful number, since it uses less digits than its factorization.

22101220221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641993269 (or 1641993267 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22101220221020 its reverse (2012202210122), we get a palindrome (24113422431142).

The spelling of 22101220221020 in words is "twenty-two trillion, one hundred one billion, two hundred twenty million, two hundred twenty-one thousand, twenty".