121531366 has 16 divisors (see below), whose sum is σ = 199252800. Its totient is φ = 55135080.

The previous prime is 121531363. The next prime is 121531393. The reversal of 121531366 is 663135121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121531363) 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, 6985 + ... + 17083.

It is an arithmetic number, because the mean of its divisors is an integer number (12453300).

Almost surely, 2^121531366 is an apocalyptic number.

121531366 is a deficient number, since it is larger than the sum of its proper divisors (77721434).

121531366 is a wasteful number, since it uses less digits than its factorization.

121531366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659.

The product of its digits is 3240, while the sum is 28.

The square root of 121531366 is about 11024.1265413637. The cubic root of 121531366 is about 495.3317043462.

Adding to 121531366 its reverse (663135121), we get a palindrome (784666487).

The spelling of 121531366 in words is "one hundred twenty-one million, five hundred thirty-one thousand, three hundred sixty-six".