22111102021 has 8 divisors (see below), whose sum is σ = 22203198360. Its totient is φ = 22019094528.

The previous prime is 22111101973. The next prime is 22111102051. The reversal of 22111102021 is 12020111122.

It can be written as a sum of positive squares in 4 ways, for example, as 1042579521 + 21068522500 = 32289^2 + 145150^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111101992 and 22111102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111102051) 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, 502125 + ... + 544381.

It is an arithmetic number, because the mean of its divisors is an integer number (2775399795).

Almost surely, 2^22111102021 is an apocalyptic number.

It is an amenable number.

22111102021 is a deficient number, since it is larger than the sum of its proper divisors (92096339).

22111102021 is a wasteful number, since it uses less digits than its factorization.

22111102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44423.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22111102021 its reverse (12020111122), we get a palindrome (34131213143).

The spelling of 22111102021 in words is "twenty-two billion, one hundred eleven million, one hundred two thousand, twenty-one".