131121434 has 4 divisors (see below), whose sum is σ = 196682154. Its totient is φ = 65560716.

The previous prime is 131121433. The next prime is 131121439. The reversal of 131121434 is 434121131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434121131 = 12671 ⋅34261.

It can be written as a sum of positive squares in only one way, i.e., 125104225 + 6017209 = 11185^2 + 2453^2 .

It is not an unprimeable number, because it can be changed into a prime (131121433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780357 + ... + 32780360.

Almost surely, 2^131121434 is an apocalyptic number.

131121434 is a deficient number, since it is larger than the sum of its proper divisors (65560720).

131121434 is an equidigital number, since it uses as much as digits as its factorization.

131121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65560719.

The product of its digits is 288, while the sum is 20.

The square root of 131121434 is about 11450.8267823769. The cubic root of 131121434 is about 508.0321889414.

Adding to 131121434 its reverse (434121131), we get a palindrome (565242565).

The spelling of 131121434 in words is "one hundred thirty-one million, one hundred twenty-one thousand, four hundred thirty-four".