121211213 has 8 divisors (see below), whose sum is σ = 126382080. Its totient is φ = 116106480.

The previous prime is 121211183. The next prime is 121211221. The reversal of 121211213 is 312112121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121211213 - 2¹⁶ = 121145677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12773 + ... + 20138.

It is an arithmetic number, because the mean of its divisors is an integer number (15797760).

Almost surely, 2^121211213 is an apocalyptic number.

It is an amenable number.

121211213 is a deficient number, since it is larger than the sum of its proper divisors (5170867).

121211213 is a wasteful number, since it uses less digits than its factorization.

121211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33067.

The product of its digits is 24, while the sum is 14.

The square root of 121211213 is about 11009.5964049551. The cubic root of 121211213 is about 494.8963671089.

Adding to 121211213 its reverse (312112121), we get a palindrome (433323334).

The spelling of 121211213 in words is "one hundred twenty-one million, two hundred eleven thousand, two hundred thirteen".