22102122021 has 40 divisors (see below), whose sum is σ = 35219663424. Its totient is φ = 12077450880.

The previous prime is 22102122017. The next prime is 22102122023. The reversal of 22102122021 is 12022120122.

It is not a de Polignac number, because 22102122021 - 2² = 22102122017 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 (22102122023) 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 39 ways as a sum of consecutive naturals, for example, 5874781 + ... + 5878541.

Almost surely, 2^22102122021 is an apocalyptic number.

22102122021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22102122021 is a deficient number, since it is larger than the sum of its proper divisors (13117541403).

22102122021 is an frugal number, since it uses more digits than its factorization.

22102122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3863 (or 3794 counting only the distinct ones).

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

Adding to 22102122021 its reverse (12022120122), we get a palindrome (34124242143).

The spelling of 22102122021 in words is "twenty-two billion, one hundred two million, one hundred twenty-two thousand, twenty-one".