121381843 has 8 divisors (see below), whose sum is σ = 132947136. Its totient is φ = 109905000.

The previous prime is 121381831. The next prime is 121381847. The reversal of 121381843 is 348183121.

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 121381843 - 2⁵ = 121381811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121381847) 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, 19221 + ... + 24742.

It is an arithmetic number, because the mean of its divisors is an integer number (16618392).

Almost surely, 2^121381843 is an apocalyptic number.

121381843 is a deficient number, since it is larger than the sum of its proper divisors (11565293).

121381843 is a wasteful number, since it uses less digits than its factorization.

121381843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44225.

The product of its digits is 4608, while the sum is 31.

The square root of 121381843 is about 11017.3428284682. The cubic root of 121381843 is about 495.1284814261.

The spelling of 121381843 in words is "one hundred twenty-one million, three hundred eighty-one thousand, eight hundred forty-three".