22021101220 has 24 divisors (see below), whose sum is σ = 46257228864. Its totient is φ = 8805980256.

The previous prime is 22021101173. The next prime is 22021101247. The reversal of 22021101220 is 2210112022.

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 22021101220.

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, 79494 + ... + 224413.

It is an arithmetic number, because the mean of its divisors is an integer number (1927384536).

Almost surely, 2^22021101220 is an apocalyptic number.

22021101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021101220 is an abundant number, since it is smaller than the sum of its proper divisors (24236127644).

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

22021101220 is a wasteful number, since it uses less digits than its factorization.

22021101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307539 (or 307537 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22021101220 its reverse (2210112022), we get a palindrome (24231213242).

The spelling of 22021101220 in words is "twenty-two billion, twenty-one million, one hundred one thousand, two hundred twenty".