22021122102021 has 96 divisors (see below), whose sum is σ = 37281623208960. Its totient is φ = 12266647713792.

The previous prime is 22021122102017. The next prime is 22021122102041. The reversal of 22021122102021 is 12020122112022.

It is a happy number.

22021122102021 is a `hidden beast` number, since 220 + 21 + 1 + 221 + 0 + 202 + 1 = 666.

It is not a de Polignac number, because 22021122102021 - 2² = 22021122102017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22021122101985 and 22021122102003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021122102041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 144208116 + ... + 144360738.

It is an arithmetic number, because the mean of its divisors is an integer number (388350241760).

Almost surely, 2^{22021122102021} is an apocalyptic number.

22021122102021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22021122102021 is a deficient number, since it is larger than the sum of its proper divisors (15260501106939).

22021122102021 is a wasteful number, since it uses less digits than its factorization.

22021122102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153075 (or 153072 counting only the distinct ones).

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

Adding to 22021122102021 its reverse (12020122112022), we get a palindrome (34041244214043).

The spelling of 22021122102021 in words is "twenty-two trillion, twenty-one billion, one hundred twenty-two million, one hundred two thousand, twenty-one".