102520111112161 has 2 divisors, whose sum is σ = 102520111112162. Its totient is φ = 102520111112160.

The previous prime is 102520111112113. The next prime is 102520111112197. The reversal of 102520111112161 is 161211111025201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87657698279761 + 14862412832400 = 9362569^2 + 3855180^2 .

It is an emirp because it is prime and its reverse (161211111025201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102520111112161 - 2¹⁷ = 102520110981089 is a prime.

It is not a weakly prime, because it can be changed into another prime (102520111412161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51260055556080 + 51260055556081.

It is an arithmetic number, because the mean of its divisors is an integer number (51260055556081).

Almost surely, 2^{102520111112161} is an apocalyptic number.

It is an amenable number.

102520111112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

102520111112161 is an equidigital number, since it uses as much as digits as its factorization.

102520111112161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 25.

Adding to 102520111112161 its reverse (161211111025201), we get a palindrome (263731222137362).

The spelling of 102520111112161 in words is "one hundred two trillion, five hundred twenty billion, one hundred eleven million, one hundred twelve thousand, one hundred sixty-one".