22022121210021 has 12 divisors (see below), whose sum is σ = 31812851511948. Its totient is φ = 14679973736064.

The previous prime is 22022121209993. The next prime is 22022121210071. The reversal of 22022121210021 is 12001212122022.

It is a happy number.

22022121210021 is a `hidden beast` number, since 220 + 2 + 212 + 1 + 210 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17379018504225 + 4643102705796 = 4168815^2 + 2154786^2 .

It is not a de Polignac number, because 22022121210021 - 2¹⁴ = 22022121193637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22022121209976 and 22022121210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022121210071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119936830 + ... + 120120303.

It is an arithmetic number, because the mean of its divisors is an integer number (2651070959329).

Almost surely, 2^{22022121210021} is an apocalyptic number.

It is an amenable number.

22022121210021 is a deficient number, since it is larger than the sum of its proper divisors (9790730301927).

22022121210021 is a wasteful number, since it uses less digits than its factorization.

22022121210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240067332 (or 240067329 counting only the distinct ones).

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

Adding to 22022121210021 its reverse (12001212122022), we get a palindrome (34023333332043).

The spelling of 22022121210021 in words is "twenty-two trillion, twenty-two billion, one hundred twenty-one million, two hundred ten thousand, twenty-one".