121438321 has 8 divisors (see below), whose sum is σ = 129666240. Its totient is φ = 113456112.

The previous prime is 121438313. The next prime is 121438333. The reversal of 121438321 is 123834121.

It is a happy number.

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 121438321 - 2³ = 121438313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a pancake number, because a pancake can be divided into 121438321 parts by 15584 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121438301) 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, 60406 + ... + 62383.

It is an arithmetic number, because the mean of its divisors is an integer number (16208280).

Almost surely, 2^121438321 is an apocalyptic number.

It is an amenable number.

121438321 is a deficient number, since it is larger than the sum of its proper divisors (8227919).

121438321 is a wasteful number, since it uses less digits than its factorization.

121438321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122855.

The product of its digits is 1152, while the sum is 25.

The square root of 121438321 is about 11019.9056711026. The cubic root of 121438321 is about 495.2052626252.

It can be divided in two parts, 1214383 and 21, that added together give a square (1214404 = 1102²).

The spelling of 121438321 in words is "one hundred twenty-one million, four hundred thirty-eight thousand, three hundred twenty-one".