222121102211101 has 2 divisors, whose sum is σ = 222121102211102. Its totient is φ = 222121102211100.

The previous prime is 222121102211077. The next prime is 222121102211111. The reversal of 222121102211101 is 101112201121222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183634885928025 + 38486216283076 = 13551195^2 + 6203726^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121102211101 - 2²⁷ = 222120967993373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121102211111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060551105550 + 111060551105551.

It is an arithmetic number, because the mean of its divisors is an integer number (111060551105551).

Almost surely, 2^{222121102211101} is an apocalyptic number.

It is an amenable number.

222121102211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121102211101 is an equidigital number, since it uses as much as digits as its factorization.

222121102211101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222121102211101 its reverse (101112201121222), we get a palindrome (323233303332323).

The spelling of 222121102211101 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred eleven thousand, one hundred one".