121438319 has 4 divisors (see below), whose sum is σ = 121461696. Its totient is φ = 121414944.

The previous prime is 121438313. The next prime is 121438333. The reversal of 121438319 is 913834121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 913834121 = 911 ⋅1003111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121438319 is a prime.

It is a super-2 number, since 2×121438319² = 29494530643091522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121438313) 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, 2 + ... + 15584.

It is an arithmetic number, because the mean of its divisors is an integer number (30365424).

Almost surely, 2^121438319 is an apocalyptic number.

121438319 is a deficient number, since it is larger than the sum of its proper divisors (23377).

121438319 is an equidigital number, since it uses as much as digits as its factorization.

121438319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23376.

The product of its digits is 5184, while the sum is 32.

The square root of 121438319 is about 11019.9055803578. The cubic root of 121438319 is about 495.2052599067.

The spelling of 121438319 in words is "one hundred twenty-one million, four hundred thirty-eight thousand, three hundred nineteen".