22200121020 has 192 divisors, whose sum is σ = 77680705536. Its totient is φ = 4602174720.

The previous prime is 22200121001. The next prime is 22200121033. The reversal of 22200121020 is 2012100222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22200120987 and 22200121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2041237 + ... + 2052083.

It is an arithmetic number, because the mean of its divisors is an integer number (404587008).

Almost surely, 2^22200121020 is an apocalyptic number.

22200121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22200121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38840352768).

22200121020 is an abundant number, since it is smaller than the sum of its proper divisors (55480584516).

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

22200121020 is a wasteful number, since it uses less digits than its factorization.

22200121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11320 (or 11318 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22200121020 its reverse (2012100222), we get a palindrome (24212221242).

The spelling of 22200121020 in words is "twenty-two billion, two hundred million, one hundred twenty-one thousand, twenty".