121133213 has 4 divisors (see below), whose sum is σ = 125040768. Its totient is φ = 117225660.

The previous prime is 121133209. The next prime is 121133231. The reversal of 121133213 is 312331121.

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 121133213 - 2² = 121133209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121133191 and 121133200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121133263) 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, 1953731 + ... + 1953792.

It is an arithmetic number, because the mean of its divisors is an integer number (31260192).

Almost surely, 2^121133213 is an apocalyptic number.

It is an amenable number.

121133213 is a deficient number, since it is larger than the sum of its proper divisors (3907555).

121133213 is an equidigital number, since it uses as much as digits as its factorization.

121133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907554.

The product of its digits is 108, while the sum is 17.

The square root of 121133213 is about 11006.0534707042. The cubic root of 121133213 is about 494.7901882639.

Adding to 121133213 its reverse (312331121), we get a palindrome (433464334).

The spelling of 121133213 in words is "one hundred twenty-one million, one hundred thirty-three thousand, two hundred thirteen".