22120220202021 has 6 divisors (see below), whose sum is σ = 31951429180710. Its totient is φ = 14746813468008.

The previous prime is 22120220202019. The next prime is 22120220202053. The reversal of 22120220202021 is 12020202202122.

22120220202021 is a `hidden beast` number, since 221 + 2 + 0 + 220 + 20 + 202 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16976913293025 + 5143306908996 = 4120305^2 + 2267886^2 .

It is not a de Polignac number, because 22120220202021 - 2¹ = 22120220202019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120220201985 and 22120220202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120220202061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228901122326 + ... + 1228901122343.

It is an arithmetic number, because the mean of its divisors is an integer number (5325238196785).

Almost surely, 2^{22120220202021} is an apocalyptic number.

It is an amenable number.

22120220202021 is a deficient number, since it is larger than the sum of its proper divisors (9831208978689).

22120220202021 is a wasteful number, since it uses less digits than its factorization.

22120220202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457802244675 (or 2457802244672 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22120220202021 its reverse (12020202202122), we get a palindrome (34140422404143).

The spelling of 22120220202021 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty million, two hundred two thousand, twenty-one".