22102210020021 has 4 divisors (see below), whose sum is σ = 29469613360032. Its totient is φ = 14734806680012.

The previous prime is 22102210020017. The next prime is 22102210020031. The reversal of 22102210020021 is 12002001220122.

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.

It is a cyclic number.

It is not a de Polignac number, because 22102210020021 - 2² = 22102210020017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102210020031) 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, 3683701670001 + ... + 3683701670006.

It is an arithmetic number, because the mean of its divisors is an integer number (7367403340008).

Almost surely, 2^{22102210020021} is an apocalyptic number.

It is an amenable number.

22102210020021 is a deficient number, since it is larger than the sum of its proper divisors (7367403340011).

22102210020021 is an equidigital number, since it uses as much as digits as its factorization.

22102210020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367403340010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22102210020021 its reverse (12002001220122), we get a palindrome (34104211240143).

The spelling of 22102210020021 in words is "twenty-two trillion, one hundred two billion, two hundred ten million, twenty thousand, twenty-one".