121101213 has 4 divisors (see below), whose sum is σ = 161468288. Its totient is φ = 80734140.

The previous prime is 121101203. The next prime is 121101229. The reversal of 121101213 is 312101121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312101121 = 3 ⋅104033707.

It is not a de Polignac number, because 121101213 - 2⁹ = 121100701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101203) 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 in 3 ways as a sum of consecutive naturals, for example, 20183533 + ... + 20183538.

It is an arithmetic number, because the mean of its divisors is an integer number (40367072).

Almost surely, 2^121101213 is an apocalyptic number.

It is an amenable number.

121101213 is a deficient number, since it is larger than the sum of its proper divisors (40367075).

121101213 is an equidigital number, since it uses as much as digits as its factorization.

121101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367074.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121101213 is about 11004.5996292459. The cubic root of 121101213 is about 494.7466145265.

Adding to 121101213 its reverse (312101121), we get a palindrome (433202334).

The spelling of 121101213 in words is "one hundred twenty-one million, one hundred one thousand, two hundred thirteen".