22200012222021 has 6 divisors (see below), whose sum is σ = 32066684320710. Its totient is φ = 14800008148008.

The previous prime is 22200012221999. The next prime is 22200012222071. The reversal of 22200012222021 is 12022221000222.

It can be written as a sum of positive squares in only one way, i.e., 12471414557121 + 9728597664900 = 3531489^2 + 3119070^2 .

It is not a de Polignac number, because 22200012222021 - 2⁹ = 22200012221509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22200012221985 and 22200012222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200012222071) 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, 1233334012326 + ... + 1233334012343.

It is an arithmetic number, because the mean of its divisors is an integer number (5344447386785).

Almost surely, 2^{22200012222021} is an apocalyptic number.

It is an amenable number.

22200012222021 is a deficient number, since it is larger than the sum of its proper divisors (9866672098689).

22200012222021 is a wasteful number, since it uses less digits than its factorization.

22200012222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466668024675 (or 2466668024672 counting only the distinct ones).

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

Adding to 22200012222021 its reverse (12022221000222), we get a palindrome (34222233222243).

The spelling of 22200012222021 in words is "twenty-two trillion, two hundred billion, twelve million, two hundred twenty-two thousand, twenty-one".