222001021122121 has 2 divisors, whose sum is σ = 222001021122122. Its totient is φ = 222001021122120.

The previous prime is 222001021122113. The next prime is 222001021122149. The reversal of 222001021122121 is 121221120100222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221494163982400 + 506857139721 = 14882680^2 + 711939^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001021122121 - 2³ = 222001021122113 is a prime.

It is not a weakly prime, because it can be changed into another prime (222001021126121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111000510561060 + 111000510561061.

It is an arithmetic number, because the mean of its divisors is an integer number (111000510561061).

Almost surely, 2^{222001021122121} is an apocalyptic number.

It is an amenable number.

222001021122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222001021122121 is an equidigital number, since it uses as much as digits as its factorization.

222001021122121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222001021122121 its reverse (121221120100222), we get a palindrome (343222141222343).

The spelling of 222001021122121 in words is "two hundred twenty-two trillion, one billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".