22121101210220 has 96 divisors (see below), whose sum is σ = 51487396668288. Its totient is φ = 7940729679872.

The previous prime is 22121101210177. The next prime is 22121101210259. The reversal of 22121101210220 is 2201210112122.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1982867 + ... + 6940746.

It is an arithmetic number, because the mean of its divisors is an integer number (536327048628).

Almost surely, 2^{22121101210220} is an apocalyptic number.

22121101210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121101210220 is an abundant number, since it is smaller than the sum of its proper divisors (29366295458068).

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

22121101210220 is a wasteful number, since it uses less digits than its factorization.

22121101210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923979 (or 8923977 counting only the distinct ones).

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

Adding to 22121101210220 its reverse (2201210112122), we get a palindrome (24322311322342).

The spelling of 22121101210220 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred one million, two hundred ten thousand, two hundred twenty".