112121131 has 4 divisors (see below), whose sum is σ = 113472072. Its totient is φ = 110770192.

The previous prime is 112121117. The next prime is 112121143. The reversal of 112121131 is 131121211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 112121131 - 2⁵ = 112121099 is a prime.

It is a super-2 number, since 2×112121131² = 25142296033438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112121161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675346 + ... + 675511.

It is an arithmetic number, because the mean of its divisors is an integer number (28368018).

Almost surely, 2^112121131 is an apocalyptic number.

112121131 is a deficient number, since it is larger than the sum of its proper divisors (1350941).

112121131 is an equidigital number, since it uses as much as digits as its factorization.

112121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350940.

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

The square root of 112121131 is about 10588.7265995492. The cubic root of 112121131 is about 482.2021657861.

Adding to 112121131 its reverse (131121211), we get a palindrome (243242342).

The spelling of 112121131 in words is "one hundred twelve million, one hundred twenty-one thousand, one hundred thirty-one".