22120220021 has 8 divisors (see below), whose sum is σ = 23423946624. Its totient is φ = 20816775360.

The previous prime is 22120220011. The next prime is 22120220029. The reversal of 22120220021 is 12002202122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22120220021 - 2³⁰ = 21046478197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120219978 and 22120220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120220029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103316 + ... + 234338.

It is an arithmetic number, because the mean of its divisors is an integer number (2927993328).

Almost surely, 2^22120220021 is an apocalyptic number.

It is an amenable number.

22120220021 is a deficient number, since it is larger than the sum of its proper divisors (1303726603).

22120220021 is a wasteful number, since it uses less digits than its factorization.

22120220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140971.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22120220021 its reverse (12002202122), we get a palindrome (34122422143).

The spelling of 22120220021 in words is "twenty-two billion, one hundred twenty million, two hundred twenty thousand, twenty-one".