22021222212120 has 128 divisors (see below), whose sum is σ = 66587688921600. Its totient is φ = 5825808070656.

The previous prime is 22021222212113. The next prime is 22021222212229. The reversal of 22021222212120 is 2121222212022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22318672 + ... + 23284448.

It is an arithmetic number, because the mean of its divisors is an integer number (520216319700).

Almost surely, 2^{22021222212120} is an apocalyptic number.

22021222212120 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 22021222212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33293844460800).

22021222212120 is an abundant number, since it is smaller than the sum of its proper divisors (44566466709480).

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

22021222212120 is a wasteful number, since it uses less digits than its factorization.

22021222212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967297 (or 967293 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22021222212120 its reverse (2121222212022), we get a palindrome (24142444424142).

The spelling of 22021222212120 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".