22010121020021 has 2 divisors, whose sum is σ = 22010121020022. Its totient is φ = 22010121020020.

The previous prime is 22010121020003. The next prime is 22010121020023. The reversal of 22010121020021 is 12002012101022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19161499438225 + 2848621581796 = 4377385^2 + 1687786^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010121020021 - 2¹⁰ = 22010121018997 is a prime.

Together with 22010121020023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22010121019978 and 22010121020005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22010121020023) 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 as a sum of consecutive naturals, namely, 11005060510010 + 11005060510011.

It is an arithmetic number, because the mean of its divisors is an integer number (11005060510011).

Almost surely, 2^{22010121020021} is an apocalyptic number.

It is an amenable number.

22010121020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010121020021 is an equidigital number, since it uses as much as digits as its factorization.

22010121020021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22010121020021 its reverse (12002012101022), we get a palindrome (34012133121043).

The spelling of 22010121020021 in words is "twenty-two trillion, ten billion, one hundred twenty-one million, twenty thousand, twenty-one".