121833857 has 4 divisors (see below), whose sum is σ = 122057136. Its totient is φ = 121610580.

The previous prime is 121833853. The next prime is 121833869. The reversal of 121833857 is 758338121.

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 121833857 - 2² = 121833853 is a prime.

It is a super-2 number, since 2×121833857² = 29686977422992898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121833857.

It is not an unprimeable number, because it can be changed into a prime (121833853) 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, 110819 + ... + 111912.

It is an arithmetic number, because the mean of its divisors is an integer number (30514284).

Almost surely, 2^121833857 is an apocalyptic number.

It is an amenable number.

121833857 is a deficient number, since it is larger than the sum of its proper divisors (223279).

121833857 is an equidigital number, since it uses as much as digits as its factorization.

121833857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223278.

The product of its digits is 40320, while the sum is 38.

The square root of 121833857 is about 11037.8375146584. The cubic root of 121833857 is about 495.7423232878.

The spelling of 121833857 in words is "one hundred twenty-one million, eight hundred thirty-three thousand, eight hundred fifty-seven".