22221221222000 has 80 divisors (see below), whose sum is σ = 53737584723264. Its totient is φ = 8887384800000.

The previous prime is 22221221221957. The next prime is 22221221222021. The reversal of 22221221222000 is 22212212222.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15516245 + ... + 16887755.

Almost surely, 2^{22221221222000} is an apocalyptic number.

22221221222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221221222000 is an abundant number, since it is smaller than the sum of its proper divisors (31516363501264).

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

22221221222000 is a wasteful number, since it uses less digits than its factorization.

22221221222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379635 (or 1379619 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22221221222000 its reverse (22212212222), we get a palindrome (22243433434222).

The spelling of 22221221222000 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand".