22121022221000 has 32 divisors (see below), whose sum is σ = 51763191999480. Its totient is φ = 8848408888000.

The previous prime is 22121022220943. The next prime is 22121022221017. The reversal of 22121022221000 is 12222012122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1404305581156 + 20716716639844 = 1185034^2 + 4551562^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22121022221000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11060510111 + ... + 11060512110.

Almost surely, 2^{22121022221000} is an apocalyptic number.

22121022221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121022221000 is an abundant number, since it is smaller than the sum of its proper divisors (29642169778480).

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

22121022221000 is a wasteful number, since it uses less digits than its factorization.

22121022221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22121022242 (or 22121022228 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22121022221000 its reverse (12222012122), we get a palindrome (22133244233122).

The spelling of 22121022221000 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand".