121211313 has 4 divisors (see below), whose sum is σ = 161615088. Its totient is φ = 80807540.

The previous prime is 121211273. The next prime is 121211323. The reversal of 121211313 is 313112121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121211313 - 2¹⁷ = 121080241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121211292 and 121211301.

It is not an unprimeable number, because it can be changed into a prime (121211323) 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, 20201883 + ... + 20201888.

It is an arithmetic number, because the mean of its divisors is an integer number (40403772).

Almost surely, 2^121211313 is an apocalyptic number.

It is an amenable number.

121211313 is a deficient number, since it is larger than the sum of its proper divisors (40403775).

121211313 is an equidigital number, since it uses as much as digits as its factorization.

121211313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40403774.

The product of its digits is 36, while the sum is 15.

The square root of 121211313 is about 11009.6009464467. The cubic root of 121211313 is about 494.8965032063.

Adding to 121211313 its reverse (313112121), we get a palindrome (434323434).

The spelling of 121211313 in words is "one hundred twenty-one million, two hundred eleven thousand, three hundred thirteen".