2122251024221 has 2 divisors, whose sum is σ = 2122251024222. Its totient is φ = 2122251024220.

The previous prime is 2122251024211. The next prime is 2122251024227. The reversal of 2122251024221 is 1224201522212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1305054912100 + 817196112121 = 1142390^2 + 903989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122251024221 - 2³⁸ = 1847373117277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122251024227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061125512110 + 1061125512111.

It is an arithmetic number, because the mean of its divisors is an integer number (1061125512111).

Almost surely, 2^{2122251024221} is an apocalyptic number.

It is an amenable number.

2122251024221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122251024221 is an equidigital number, since it uses as much as digits as its factorization.

2122251024221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 2122251024221 its reverse (1224201522212), we get a palindrome (3346452546433).

The spelling of 2122251024221 in words is "two trillion, one hundred twenty-two billion, two hundred fifty-one million, twenty-four thousand, two hundred twenty-one".