102215344342561 has 2 divisors, whose sum is σ = 102215344342562. Its totient is φ = 102215344342560.

The previous prime is 102215344342523. The next prime is 102215344342583. The reversal of 102215344342561 is 165243443512201.

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., 99328012726336 + 2887331616225 = 9966344^2 + 1699215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102215344342561 is a prime.

It is not a weakly prime, because it can be changed into another prime (102215344342061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51107672171280 + 51107672171281.

It is an arithmetic number, because the mean of its divisors is an integer number (51107672171281).

Almost surely, 2^{102215344342561} is an apocalyptic number.

It is an amenable number.

102215344342561 is a deficient number, since it is larger than the sum of its proper divisors (1).

102215344342561 is an equidigital number, since it uses as much as digits as its factorization.

102215344342561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 43.

Adding to 102215344342561 its reverse (165243443512201), we get a palindrome (267458787854762).

The spelling of 102215344342561 in words is "one hundred two trillion, two hundred fifteen billion, three hundred forty-four million, three hundred forty-two thousand, five hundred sixty-one".