22200002021 has 4 divisors (see below), whose sum is σ = 23368423200. Its totient is φ = 21031580844.

The previous prime is 22200001991. The next prime is 22200002023. The reversal of 22200002021 is 12020000222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12020000222 = 2 ⋅6010000111.

It is a cyclic number.

It is not a de Polignac number, because 22200002021 - 2²⁶ = 22132893157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22200001993 and 22200002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200002023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584210561 + ... + 584210598.

It is an arithmetic number, because the mean of its divisors is an integer number (5842105800).

Almost surely, 2^22200002021 is an apocalyptic number.

It is an amenable number.

22200002021 is a deficient number, since it is larger than the sum of its proper divisors (1168421179).

22200002021 is a wasteful number, since it uses less digits than its factorization.

22200002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168421178.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 22200002021 its reverse (12020000222), we get a palindrome (34220002243).

The spelling of 22200002021 in words is "twenty-two billion, two hundred million, two thousand, twenty-one".