22221102020 has 48 divisors (see below), whose sum is σ = 50473461360. Its totient is φ = 8168864256.

The previous prime is 22221102019. The next prime is 22221102049. The reversal of 22221102020 is 2020112222.

It can be written as a sum of positive squares in 8 ways, for example, as 1110755584 + 21110346436 = 33328^2 + 145294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22221101986 and 22221102004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127067 + ... + 246146.

It is an arithmetic number, because the mean of its divisors is an integer number (1051530445).

Almost surely, 2^22221102020 is an apocalyptic number.

22221102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221102020 is an abundant number, since it is smaller than the sum of its proper divisors (28252359340).

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

22221102020 is a wasteful number, since it uses less digits than its factorization.

22221102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373464 (or 373462 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22221102020 its reverse (2020112222), we get a palindrome (24241214242).

The spelling of 22221102020 in words is "twenty-two billion, two hundred twenty-one million, one hundred two thousand, twenty".