22221221001020 has 24 divisors (see below), whose sum is σ = 46664710303344. Its totient is φ = 8888460552576.

The previous prime is 22221221000873. The next prime is 22221221001061. The reversal of 22221221001020 is 2010012212222.

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 22221221001020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5546912 + ... + 8672408.

It is an arithmetic number, because the mean of its divisors is an integer number (1944362929306).

Almost surely, 2^{22221221001020} is an apocalyptic number.

22221221001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221221001020 is an abundant number, since it is smaller than the sum of its proper divisors (24443489302324).

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

22221221001020 is a wasteful number, since it uses less digits than its factorization.

22221221001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480989 (or 3480987 counting only the distinct ones).

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

Adding to 22221221001020 its reverse (2010012212222), we get a palindrome (24231233213242).

The spelling of 22221221001020 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, one thousand, twenty".