121403121 has 8 divisors (see below), whose sum is σ = 184995264. Its totient is φ = 69373200.

The previous prime is 121403119. The next prime is 121403153. The reversal of 121403121 is 121304121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121403121 - 2¹ = 121403119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121403121.

It is not an unprimeable number, because it can be changed into a prime (121403221) 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 7 ways as a sum of consecutive naturals, for example, 2890530 + ... + 2890571.

It is an arithmetic number, because the mean of its divisors is an integer number (23124408).

Almost surely, 2^121403121 is an apocalyptic number.

It is an amenable number.

121403121 is a deficient number, since it is larger than the sum of its proper divisors (63592143).

121403121 is an equidigital number, since it uses as much as digits as its factorization.

121403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5781111.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121403121 is about 11018.3084454920. The cubic root of 121403121 is about 495.1574114209.

Adding to 121403121 its reverse (121304121), we get a palindrome (242707242).

The spelling of 121403121 in words is "one hundred twenty-one million, four hundred three thousand, one hundred twenty-one".