131121293 has 2 divisors, whose sum is σ = 131121294. Its totient is φ = 131121292.

The previous prime is 131121281. The next prime is 131121307. The reversal of 131121293 is 392121131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124500964 + 6620329 = 11158^2 + 2573^2 .

It is an emirp because it is prime and its reverse (392121131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131121293 - 2²⁰ = 130072717 is a prime.

It is a super-3 number, since 3×131121293³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131121253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560646 + 65560647.

It is an arithmetic number, because the mean of its divisors is an integer number (65560647).

Almost surely, 2^131121293 is an apocalyptic number.

It is an amenable number.

131121293 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121293 is an equidigital number, since it uses as much as digits as its factorization.

131121293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 131121293 is about 11450.8206256146. The cubic root of 131121293 is about 508.0320068390.

The spelling of 131121293 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred ninety-three".