121504331 has 16 divisors (see below), whose sum is σ = 137168640. Its totient is φ = 106788000.

The previous prime is 121504319. The next prime is 121504343. The reversal of 121504331 is 133405121.

It is an interprime number because it is at equal distance from previous prime (121504319) and next prime (121504343).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121504331 is a prime.

It is a super-2 number, since 2×121504331² = 29526604903515122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121504351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74240 + ... + 75858.

It is an arithmetic number, because the mean of its divisors is an integer number (8573040).

Almost surely, 2^121504331 is an apocalyptic number.

121504331 is a deficient number, since it is larger than the sum of its proper divisors (15664309).

121504331 is a wasteful number, since it uses less digits than its factorization.

121504331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 121504331 is about 11022.9002989231. The cubic root of 121504331 is about 495.2949723042.

Adding to 121504331 its reverse (133405121), we get a palindrome (254909452).

The spelling of 121504331 in words is "one hundred twenty-one million, five hundred four thousand, three hundred thirty-one".