121201331 has 16 divisors (see below), whose sum is σ = 126137088. Its totient is φ = 116407200.

The previous prime is 121201319. The next prime is 121201343. The reversal of 121201331 is 133102121.

It is an interprime number because it is at equal distance from previous prime (121201319) and next prime (121201343).

It is a cyclic number.

It is not a de Polignac number, because 121201331 - 2¹⁰ = 121200307 is a prime.

It is a super-2 number, since 2×121201331² = 29379525272343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771905 + ... + 772061.

It is an arithmetic number, because the mean of its divisors is an integer number (7883568).

Almost surely, 2^121201331 is an apocalyptic number.

121201331 is a deficient number, since it is larger than the sum of its proper divisors (4935757).

121201331 is a wasteful number, since it uses less digits than its factorization.

121201331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121201331 is about 11009.1476055142. The cubic root of 121201331 is about 494.8829175864.

Adding to 121201331 its reverse (133102121), we get a palindrome (254303452).

The spelling of 121201331 in words is "one hundred twenty-one million, two hundred one thousand, three hundred thirty-one".