69031992121 has 2 divisors, whose sum is σ = 69031992122. Its totient is φ = 69031992120.

The previous prime is 69031992059. The next prime is 69031992131. The reversal of 69031992121 is 12129913096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64092010896 + 4939981225 = 253164^2 + 70285^2 .

It is a cyclic number.

It is not a de Polignac number, because 69031992121 - 2²⁵ = 68998437689 is a prime.

It is not a weakly prime, because it can be changed into another prime (69031992131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34515996060 + 34515996061.

It is an arithmetic number, because the mean of its divisors is an integer number (34515996061).

Almost surely, 2^69031992121 is an apocalyptic number.

It is an amenable number.

69031992121 is a deficient number, since it is larger than the sum of its proper divisors (1).

69031992121 is an equidigital number, since it uses as much as digits as its factorization.

69031992121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 69031992121 in words is "sixty-nine billion, thirty-one million, nine hundred ninety-two thousand, one hundred twenty-one".