22202102012021 has 4 divisors (see below), whose sum is σ = 22202114203500. Its totient is φ = 22202089820544.

The previous prime is 22202102012003. The next prime is 22202102012047. The reversal of 22202102012021 is 12021020120222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15111140163025 + 7090961848996 = 3887305^2 + 2662886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22202102012021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22202102012921) 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, 2753066 + ... + 7209963.

It is an arithmetic number, because the mean of its divisors is an integer number (5550528550875).

Almost surely, 2^{22202102012021} is an apocalyptic number.

It is an amenable number.

22202102012021 is a deficient number, since it is larger than the sum of its proper divisors (12191479).

22202102012021 is an equidigital number, since it uses as much as digits as its factorization.

22202102012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12191478.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22202102012021 its reverse (12021020120222), we get a palindrome (34223122132243).

The spelling of 22202102012021 in words is "twenty-two trillion, two hundred two billion, one hundred two million, twelve thousand, twenty-one".