22121011222220 has 24 divisors (see below), whose sum is σ = 46454930573184. Its totient is φ = 8848250773376.

The previous prime is 22121011222217. The next prime is 22121011222291. The reversal of 22121011222220 is 2222211012122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22121011222192 and 22121011222201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8423612 + ... + 10733091.

It is an arithmetic number, because the mean of its divisors is an integer number (1935622107216).

Almost surely, 2^{22121011222220} is an apocalyptic number.

22121011222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121011222220 is an abundant number, since it is smaller than the sum of its proper divisors (24333919350964).

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

22121011222220 is a wasteful number, since it uses less digits than its factorization.

22121011222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19214449 (or 19214447 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22121011222220 its reverse (2222211012122), we get a palindrome (24343222234342).

The spelling of 22121011222220 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, two hundred twenty-two thousand, two hundred twenty".