12161545031 has 2 divisors, whose sum is σ = 12161545032. Its totient is φ = 12161545030.

The previous prime is 12161545003. The next prime is 12161545049. The reversal of 12161545031 is 13054516121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12161545031 - 2¹⁴ = 12161528647 is a prime.

It is a super-2 number, since 2×12161545031² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12161544985 and 12161545003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12161545001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6080772515 + 6080772516.

It is an arithmetic number, because the mean of its divisors is an integer number (6080772516).

Almost surely, 2^12161545031 is an apocalyptic number.

12161545031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12161545031 is an equidigital number, since it uses as much as digits as its factorization.

12161545031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 12161545031 in words is "twelve billion, one hundred sixty-one million, five hundred forty-five thousand, thirty-one".