345102111521 has 2 divisors, whose sum is σ = 345102111522. Its totient is φ = 345102111520.

The previous prime is 345102111493. The next prime is 345102111533. The reversal of 345102111521 is 125111201543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182188970896 + 162913140625 = 426836^2 + 403625^2 .

It is an emirp because it is prime and its reverse (125111201543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345102111521 - 2³⁸ = 70224204577 is a prime.

It is not a weakly prime, because it can be changed into another prime (345102111121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172551055760 + 172551055761.

It is an arithmetic number, because the mean of its divisors is an integer number (172551055761).

Almost surely, 2^345102111521 is an apocalyptic number.

It is an amenable number.

345102111521 is a deficient number, since it is larger than the sum of its proper divisors (1).

345102111521 is an equidigital number, since it uses as much as digits as its factorization.

345102111521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 345102111521 in words is "three hundred forty-five billion, one hundred two million, one hundred eleven thousand, five hundred twenty-one".