121211113 has 2 divisors, whose sum is σ = 121211114. Its totient is φ = 121211112.

The previous prime is 121211063. The next prime is 121211137. The reversal of 121211113 is 311112121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117570649 + 3640464 = 10843^2 + 1908^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211113 - 2⁹ = 121210601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121211093 and 121211102.

It is not a weakly prime, because it can be changed into another prime (121211183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605556 + 60605557.

It is an arithmetic number, because the mean of its divisors is an integer number (60605557).

Almost surely, 2^121211113 is an apocalyptic number.

It is an amenable number.

121211113 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211113 is an equidigital number, since it uses as much as digits as its factorization.

121211113 is an evil number, because the sum of its binary digits is even.

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

The square root of 121211113 is about 11009.5918634616. The cubic root of 121211113 is about 494.8962310113.

Adding to 121211113 its reverse (311112121), we get a palindrome (432323234).

The spelling of 121211113 in words is "one hundred twenty-one million, two hundred eleven thousand, one hundred thirteen".