121403163 has 32 divisors (see below), whose sum is σ = 188987904. Its totient is φ = 67894272.

The previous prime is 121403153. The next prime is 121403201. The reversal of 121403163 is 361304121.

It is not a de Polignac number, because 121403163 - 2⁹ = 121402651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (121403153) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 217681 + ... + 218237.

It is an arithmetic number, because the mean of its divisors is an integer number (5905872).

Almost surely, 2^121403163 is an apocalyptic number.

121403163 is a deficient number, since it is larger than the sum of its proper divisors (67584741).

121403163 is a wasteful number, since it uses less digits than its factorization.

121403163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 121403163 is about 11018.3103514105. The cubic root of 121403163 is about 495.1574685216.

Adding to 121403163 its reverse (361304121), we get a palindrome (482707284).

The spelling of 121403163 in words is "one hundred twenty-one million, four hundred three thousand, one hundred sixty-three".