39123592121 has 2 divisors, whose sum is σ = 39123592122. Its totient is φ = 39123592120.

The previous prime is 39123592103. The next prime is 39123592133. The reversal of 39123592121 is 12129532193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38273053225 + 850538896 = 195635^2 + 29164^2 .

It is a cyclic number.

It is not a de Polignac number, because 39123592121 - 2¹⁸ = 39123329977 is a prime.

It is not a weakly prime, because it can be changed into another prime (39123592421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19561796060 + 19561796061.

It is an arithmetic number, because the mean of its divisors is an integer number (19561796061).

Almost surely, 2^39123592121 is an apocalyptic number.

It is an amenable number.

39123592121 is a deficient number, since it is larger than the sum of its proper divisors (1).

39123592121 is an equidigital number, since it uses as much as digits as its factorization.

39123592121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The spelling of 39123592121 in words is "thirty-nine billion, one hundred twenty-three million, five hundred ninety-two thousand, one hundred twenty-one".