131003121 has 16 divisors (see below), whose sum is σ = 184109760. Its totient is φ = 82729920.

The previous prime is 131003113. The next prime is 131003149. The reversal of 131003121 is 121300131.

It is not a de Polignac number, because 131003121 - 2³ = 131003113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131003097 and 131003106.

It is not an unprimeable number, because it can be changed into a prime (131003111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9595 + ... + 18816.

It is an arithmetic number, because the mean of its divisors is an integer number (11506860).

Almost surely, 2^131003121 is an apocalyptic number.

It is an amenable number.

131003121 is a deficient number, since it is larger than the sum of its proper divisors (53106639).

131003121 is a wasteful number, since it uses less digits than its factorization.

131003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28496.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131003121 is about 11445.6594829656. The cubic root of 131003121 is about 507.8793410607.

Adding to 131003121 its reverse (121300131), we get a palindrome (252303252).

The spelling of 131003121 in words is "one hundred thirty-one million, three thousand, one hundred twenty-one".