131440407121 has 4 divisors (see below), whose sum is σ = 131443148452. Its totient is φ = 131437665792.

The previous prime is 131440407103. The next prime is 131440407187. The reversal of 131440407121 is 121704044131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121704044131 = 59 ⋅2062780409.

It can be written as a sum of positive squares in 2 ways, for example, as 74826867025 + 56613540096 = 273545^2 + 237936^2 .

It is a cyclic number.

It is not a de Polignac number, because 131440407121 - 2⁵ = 131440407089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131440407121.

It is not an unprimeable number, because it can be changed into a prime (131440407421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297440 + ... + 1395073.

It is an arithmetic number, because the mean of its divisors is an integer number (32860787113).

Almost surely, 2^131440407121 is an apocalyptic number.

It is an amenable number.

131440407121 is a deficient number, since it is larger than the sum of its proper divisors (2741331).

131440407121 is an equidigital number, since it uses as much as digits as its factorization.

131440407121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741330.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 131440407121 in words is "one hundred thirty-one billion, four hundred forty million, four hundred seven thousand, one hundred twenty-one".