121001403 has 8 divisors (see below), whose sum is σ = 161390416. Its totient is φ = 80640000.

The previous prime is 121001399. The next prime is 121001411. The reversal of 121001403 is 304100121.

It is a happy number.

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

It is not a de Polignac number, because 121001403 - 2² = 121001399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001473) 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, 7803 + ... + 17403.

It is an arithmetic number, because the mean of its divisors is an integer number (20173802).

Almost surely, 2^121001403 is an apocalyptic number.

121001403 is a deficient number, since it is larger than the sum of its proper divisors (40389013).

121001403 is an equidigital number, since it uses as much as digits as its factorization.

121001403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13805.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121001403 is about 11000.0637725424. The cubic root of 121001403 is about 494.6106559871.

Adding to 121001403 its reverse (304100121), we get a palindrome (425101524).

The spelling of 121001403 in words is "one hundred twenty-one million, one thousand, four hundred three".