131042121 has 32 divisors (see below), whose sum is σ = 204902400. Its totient is φ = 74461968.

The previous prime is 131042101. The next prime is 131042161. The reversal of 131042121 is 121240131.

It is not a de Polignac number, because 131042121 - 2¹⁵ = 131009353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131042121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131042101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356880 + ... + 357246.

It is an arithmetic number, because the mean of its divisors is an integer number (6403200).

Almost surely, 2^131042121 is an apocalyptic number.

It is an amenable number.

131042121 is a deficient number, since it is larger than the sum of its proper divisors (73860279).

131042121 is an equidigital number, since it uses as much as digits as its factorization.

131042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 131042121 is about 11447.3630588009. The cubic root of 131042121 is about 507.9297350995.

Adding to 131042121 its reverse (121240131), we get a palindrome (252282252).

It can be divided in two parts, 13104 and 2121, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 131042121 in words is "one hundred thirty-one million, forty-two thousand, one hundred twenty-one".