102211222121 has 2 divisors, whose sum is σ = 102211222122. Its totient is φ = 102211222120.

The previous prime is 102211222111. The next prime is 102211222151. The reversal of 102211222121 is 121222112201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95982855721 + 6228366400 = 309811^2 + 78920^2 .

It is a cyclic number.

It is not a de Polignac number, because 102211222121 - 2²⁶ = 102144113257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102211222121.

It is not a weakly prime, because it can be changed into another prime (102211222111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105611060 + 51105611061.

It is an arithmetic number, because the mean of its divisors is an integer number (51105611061).

Almost surely, 2^102211222121 is an apocalyptic number.

It is an amenable number.

102211222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102211222121 is an equidigital number, since it uses as much as digits as its factorization.

102211222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102211222121 its reverse (121222112201), we get a palindrome (223433334322).

The spelling of 102211222121 in words is "one hundred two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".