3123121117 has 2 divisors, whose sum is σ = 3123121118. Its totient is φ = 3123121116.

The previous prime is 3123121063. The next prime is 3123121139. The reversal of 3123121117 is 7111213213.

It is an a-pointer prime, because the next prime (3123121139) can be obtained adding 3123121117 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3119334201 + 3786916 = 55851^2 + 1946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3123121117 is a prime.

It is a super-2 number, since 2×3123121117² = 19507771022902655378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123121147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561560558 + 1561560559.

It is an arithmetic number, because the mean of its divisors is an integer number (1561560559).

Almost surely, 2^3123121117 is an apocalyptic number.

It is an amenable number.

3123121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123121117 is an equidigital number, since it uses as much as digits as its factorization.

3123121117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 22.

The square root of 3123121117 is about 55884.8916702896. The cubic root of 3123121117 is about 1461.7158030456.

The spelling of 3123121117 in words is "three billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred seventeen".