121381837 has 4 divisors (see below), whose sum is σ = 122017536. Its totient is φ = 120746140.

The previous prime is 121381831. The next prime is 121381847. The reversal of 121381837 is 738183121.

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 121381837 - 2³ = 121381829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121381831) 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, 317563 + ... + 317944.

It is an arithmetic number, because the mean of its divisors is an integer number (30504384).

Almost surely, 2^121381837 is an apocalyptic number.

It is an amenable number.

121381837 is a deficient number, since it is larger than the sum of its proper divisors (635699).

121381837 is an equidigital number, since it uses as much as digits as its factorization.

121381837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635698.

The product of its digits is 8064, while the sum is 34.

The square root of 121381837 is about 11017.3425561702. The cubic root of 121381837 is about 495.1284732679.

The spelling of 121381837 in words is "one hundred twenty-one million, three hundred eighty-one thousand, eight hundred thirty-seven".