22102121012220 has 144 divisors (see below), whose sum is σ = 70266205900800. Its totient is φ = 5612806793088.

The previous prime is 22102121012207. The next prime is 22102121012227. The reversal of 22102121012220 is 2221012120122.

It is a happy number.

22102121012220 is a `hidden beast` number, since 2 + 210 + 21 + 210 + 1 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22102121012193 and 22102121012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102121012227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10819420 + ... + 12698979.

It is an arithmetic number, because the mean of its divisors is an integer number (487959763200).

Almost surely, 2^{22102121012220} is an apocalyptic number.

22102121012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22102121012220 is an abundant number, since it is smaller than the sum of its proper divisors (48164084888580).

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

22102121012220 is a wasteful number, since it uses less digits than its factorization.

22102121012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23518664 (or 23518659 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22102121012220 its reverse (2221012120122), we get a palindrome (24323133132342).

The spelling of 22102121012220 in words is "twenty-two trillion, one hundred two billion, one hundred twenty-one million, twelve thousand, two hundred twenty".