102111111240121 has 2 divisors, whose sum is σ = 102111111240122. Its totient is φ = 102111111240120.

The previous prime is 102111111240109. The next prime is 102111111240157. The reversal of 102111111240121 is 121042111111201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94973990611600 + 7137120628521 = 9745460^2 + 2671539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102111111240121 is a prime.

It is not a weakly prime, because it can be changed into another prime (102111111240161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055555620060 + 51055555620061.

It is an arithmetic number, because the mean of its divisors is an integer number (51055555620061).

Almost surely, 2^{102111111240121} is an apocalyptic number.

It is an amenable number.

102111111240121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111111240121 is an equidigital number, since it uses as much as digits as its factorization.

102111111240121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 102111111240121 its reverse (121042111111201), we get a palindrome (223153222351322).

The spelling of 102111111240121 in words is "one hundred two trillion, one hundred eleven billion, one hundred eleven million, two hundred forty thousand, one hundred twenty-one".