1230102026557 has 2 divisors, whose sum is σ = 1230102026558. Its totient is φ = 1230102026556.

The previous prime is 1230102026509. The next prime is 1230102026579. The reversal of 1230102026557 is 7556202010321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1162329796996 + 67772229561 = 1078114^2 + 260331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230102026557 - 2¹¹ = 1230102024509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230102026357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615051013278 + 615051013279.

It is an arithmetic number, because the mean of its divisors is an integer number (615051013279).

Almost surely, 2^{1230102026557} is an apocalyptic number.

It is an amenable number.

1230102026557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230102026557 is an equidigital number, since it uses as much as digits as its factorization.

1230102026557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 1230102026557 its reverse (7556202010321), we get a palindrome (8786304036878).

The spelling of 1230102026557 in words is "one trillion, two hundred thirty billion, one hundred two million, twenty-six thousand, five hundred fifty-seven".