102030311213261 has 2 divisors, whose sum is σ = 102030311213262. Its totient is φ = 102030311213260.

The previous prime is 102030311213119. The next prime is 102030311213273. The reversal of 102030311213261 is 162312113030201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101649244515625 + 381066697636 = 10082125^2 + 617306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102030311213261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102030311213261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102030311213461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51015155606630 + 51015155606631.

It is an arithmetic number, because the mean of its divisors is an integer number (51015155606631).

Almost surely, 2^{102030311213261} is an apocalyptic number.

It is an amenable number.

102030311213261 is a deficient number, since it is larger than the sum of its proper divisors (1).

102030311213261 is an equidigital number, since it uses as much as digits as its factorization.

102030311213261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 102030311213261 its reverse (162312113030201), we get a palindrome (264342424243462).

The spelling of 102030311213261 in words is "one hundred two trillion, thirty billion, three hundred eleven million, two hundred thirteen thousand, two hundred sixty-one".