121241213 has 2 divisors, whose sum is σ = 121241214. Its totient is φ = 121241212.

The previous prime is 121241189. The next prime is 121241227. The reversal of 121241213 is 312142121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80766169 + 40475044 = 8987^2 + 6362^2 .

It is a cyclic number.

It is not a de Polignac number, because 121241213 - 2⁶ = 121241149 is a prime.

It is a super-2 number, since 2×121241213² = 29398863459422738, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121241191 and 121241200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121241243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60620606 + 60620607.

It is an arithmetic number, because the mean of its divisors is an integer number (60620607).

Almost surely, 2^121241213 is an apocalyptic number.

It is an amenable number.

121241213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121241213 is an equidigital number, since it uses as much as digits as its factorization.

121241213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 121241213 is about 11010.9587684270. The cubic root of 121241213 is about 494.9371929971.

Adding to 121241213 its reverse (312142121), we get a palindrome (433383334).

The spelling of 121241213 in words is "one hundred twenty-one million, two hundred forty-one thousand, two hundred thirteen".