121993211 has 8 divisors (see below), whose sum is σ = 123135600. Its totient is φ = 120854880.

The previous prime is 121993189. The next prime is 121993213. The reversal of 121993211 is 112399121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121993211 is a prime.

It is a super-3 number, since 3×121993211³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121993213) 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 7 ways as a sum of consecutive naturals, for example, 113585 + ... + 114653.

It is an arithmetic number, because the mean of its divisors is an integer number (15391950).

Almost surely, 2^121993211 is an apocalyptic number.

121993211 is a deficient number, since it is larger than the sum of its proper divisors (1142389).

121993211 is a wasteful number, since it uses less digits than its factorization.

121993211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029.

The product of its digits is 972, while the sum is 29.

The square root of 121993211 is about 11045.0536893217. The cubic root of 121993211 is about 495.9583664218.

The spelling of 121993211 in words is "one hundred twenty-one million, nine hundred ninety-three thousand, two hundred eleven".