113211121 has 2 divisors, whose sum is σ = 113211122. Its totient is φ = 113211120.

The previous prime is 113211113. The next prime is 113211149. The reversal of 113211121 is 121112311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113209600 + 1521 = 10640^2 + 39^2 .

It is an emirp because it is prime and its reverse (121112311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113211121 - 2³ = 113211113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113211421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56605560 + 56605561.

It is an arithmetic number, because the mean of its divisors is an integer number (56605561).

Almost surely, 2^113211121 is an apocalyptic number.

It is an amenable number.

113211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

113211121 is an equidigital number, since it uses as much as digits as its factorization.

113211121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 113211121 is about 10640.0714753238. The cubic root of 113211121 is about 483.7597118505.

Adding to 113211121 its reverse (121112311), we get a palindrome (234323432).

The spelling of 113211121 in words is "one hundred thirteen million, two hundred eleven thousand, one hundred twenty-one".