121331366 has 16 divisors (see below), whose sum is σ = 197833104. Its totient is φ = 55474464.

The previous prime is 121331347. The next prime is 121331381. The reversal of 121331366 is 663133121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19025 + ... + 24588.

It is an arithmetic number, because the mean of its divisors is an integer number (12364569).

Almost surely, 2^121331366 is an apocalyptic number.

121331366 is a deficient number, since it is larger than the sum of its proper divisors (76501738).

121331366 is a wasteful number, since it uses less digits than its factorization.

121331366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43735.

The product of its digits is 1944, while the sum is 26.

The square root of 121331366 is about 11015.0517928878. The cubic root of 121331366 is about 495.0598383601.

Adding to 121331366 its reverse (663133121), we get a palindrome (784464487).

The spelling of 121331366 in words is "one hundred twenty-one million, three hundred thirty-one thousand, three hundred sixty-six".