18102334121 has 2 divisors, whose sum is σ = 18102334122. Its totient is φ = 18102334120.

The previous prime is 18102334109. The next prime is 18102334127. The reversal of 18102334121 is 12143320181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13587166096 + 4515168025 = 116564^2 + 67195^2 .

It is a cyclic number.

It is not a de Polignac number, because 18102334121 - 2¹⁰ = 18102333097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18102334127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9051167060 + 9051167061.

It is an arithmetic number, because the mean of its divisors is an integer number (9051167061).

Almost surely, 2^18102334121 is an apocalyptic number.

It is an amenable number.

18102334121 is a deficient number, since it is larger than the sum of its proper divisors (1).

18102334121 is an equidigital number, since it uses as much as digits as its factorization.

18102334121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 18102334121 in words is "eighteen billion, one hundred two million, three hundred thirty-four thousand, one hundred twenty-one".