22121121020213 has 2 divisors, whose sum is σ = 22121121020214. Its totient is φ = 22121121020212.

The previous prime is 22121121020177. The next prime is 22121121020221. The reversal of 22121121020213 is 31202012112122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15674813294449 + 6446307725764 = 3959143^2 + 2538958^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121121020213 - 2¹⁰ = 22121121019189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121121020233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060560510106 + 11060560510107.

It is an arithmetic number, because the mean of its divisors is an integer number (11060560510107).

Almost surely, 2^{22121121020213} is an apocalyptic number.

It is an amenable number.

22121121020213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121121020213 is an equidigital number, since it uses as much as digits as its factorization.

22121121020213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 22121121020213 its reverse (31202012112122), we get a palindrome (53323133132335).

The spelling of 22121121020213 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, twenty thousand, two hundred thirteen".