22121121102020 has 48 divisors (see below), whose sum is σ = 48058013934000. Its totient is φ = 8543012136960.

The previous prime is 22121121102007. The next prime is 22121121102071. The reversal of 22121121102020 is 2020112112122.

It can be written as a sum of positive squares in 8 ways, for example, as 162375149764 + 21958745952256 = 402958^2 + 4686016^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22121121102020.

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, 15225680 + ... + 16615160.

It is an arithmetic number, because the mean of its divisors is an integer number (1001208623625).

Almost surely, 2^{22121121102020} is an apocalyptic number.

22121121102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121121102020 is an abundant number, since it is smaller than the sum of its proper divisors (25936892831980).

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

22121121102020 is a wasteful number, since it uses less digits than its factorization.

22121121102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416968 (or 1416966 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121121102020 its reverse (2020112112122), we get a palindrome (24141233214142).

The spelling of 22121121102020 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, twenty".