22102121202021 has 12 divisors (see below), whose sum is σ = 36486041349472. Its totient is φ = 12629783543976.

The previous prime is 22102121202001. The next prime is 22102121202041. The reversal of 22102121202021 is 12020212120122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22102121202001) and next prime (22102121202041).

It is not a de Polignac number, because 22102121202021 - 2⁷ = 22102121201893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102121201985 and 22102121202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102121202001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175413660271 + ... + 175413660396.

Almost surely, 2^{22102121202021} is an apocalyptic number.

22102121202021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22102121202021 is a deficient number, since it is larger than the sum of its proper divisors (14383920147451).

22102121202021 is a wasteful number, since it uses less digits than its factorization.

22102121202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350827320680 (or 350827320677 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22102121202021 its reverse (12020212120122), we get a palindrome (34122333322143).

The spelling of 22102121202021 in words is "twenty-two trillion, one hundred two billion, one hundred twenty-one million, two hundred two thousand, twenty-one".