21222022022120 has 128 divisors (see below), whose sum is σ = 52328278540800. Its totient is φ = 7717489145856.

The previous prime is 21222022022077. The next prime is 21222022022147. The reversal of 21222022022120 is 2122022022212.

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 = 21222022022092 and 21222022022101.

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, 3116384 + ... + 7221903.

It is an arithmetic number, because the mean of its divisors is an integer number (408814676100).

Almost surely, 2^{21222022022120} is an apocalyptic number.

21222022022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222022022120 is an abundant number, since it is smaller than the sum of its proper divisors (31106256518680).

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

21222022022120 is a wasteful number, since it uses less digits than its factorization.

21222022022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338427 (or 10338423 counting only the distinct ones).

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

Adding to 21222022022120 its reverse (2122022022212), we get a palindrome (23344044044332).

The spelling of 21222022022120 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, twenty-two thousand, one hundred twenty".