131121411 has 4 divisors (see below), whose sum is σ = 174828552. Its totient is φ = 87414272.

The previous prime is 131121409. The next prime is 131121433. The reversal of 131121411 is 114121131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114121131 = 3 ⋅38040377.

It is a cyclic number.

It is not a de Polignac number, because 131121411 - 2¹ = 131121409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131121461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21853566 + ... + 21853571.

It is an arithmetic number, because the mean of its divisors is an integer number (43707138).

Almost surely, 2^131121411 is an apocalyptic number.

131121411 is a deficient number, since it is larger than the sum of its proper divisors (43707141).

131121411 is an equidigital number, since it uses as much as digits as its factorization.

131121411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43707140.

The product of its digits is 24, while the sum is 15.

The square root of 131121411 is about 11450.8257780826. The cubic root of 131121411 is about 508.0321592368.

Adding to 131121411 its reverse (114121131), we get a palindrome (245242542).

It can be divided in two parts, 1311 and 21411, that added together give a palindrome (22722).

The spelling of 131121411 in words is "one hundred thirty-one million, one hundred twenty-one thousand, four hundred eleven".