131112121 has 12 divisors (see below), whose sum is σ = 156644992. Its totient is φ = 107492616.

The previous prime is 131112097. The next prime is 131112131. The reversal of 131112121 is 121211131.

It is a happy number.

It is not a de Polignac number, because 131112121 - 2⁷ = 131111993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131112131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14001 + ... + 21406.

Almost surely, 2^131112121 is an apocalyptic number.

It is an amenable number.

131112121 is a deficient number, since it is larger than the sum of its proper divisors (25532871).

131112121 is an equidigital number, since it uses as much as digits as its factorization.

131112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35460 (or 35437 counting only the distinct ones).

The product of its digits is 12, while the sum is 13.

The square root of 131112121 is about 11450.4201232968. The cubic root of 131112121 is about 508.0201608652.

Adding to 131112121 its reverse (121211131), we get a palindrome (252323252).

The spelling of 131112121 in words is "one hundred thirty-one million, one hundred twelve thousand, one hundred twenty-one".