131201121 has 16 divisors (see below), whose sum is σ = 187066368. Its totient is φ = 81504000.

The previous prime is 131201101. The next prime is 131201143. The reversal of 131201121 is 121102131.

It is not a de Polignac number, because 131201121 - 2¹⁵ = 131168353 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131201097 and 131201106.

It is not an unprimeable number, because it can be changed into a prime (131201101) 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, 7585 + ... + 17886.

It is an arithmetic number, because the mean of its divisors is an integer number (11691648).

Almost surely, 2^131201121 is an apocalyptic number.

It is an amenable number.

131201121 is a deficient number, since it is larger than the sum of its proper divisors (55865247).

131201121 is a wasteful number, since it uses less digits than its factorization.

131201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25592.

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

The square root of 131201121 is about 11454.3057842892. The cubic root of 131201121 is about 508.1350843046.

Adding to 131201121 its reverse (121102131), we get a palindrome (252303252).

It can be divided in two parts, 13120 and 1121, that added together give a palindrome (14241).

The spelling of 131201121 in words is "one hundred thirty-one million, two hundred one thousand, one hundred twenty-one".