121421003 has 4 divisors (see below), whose sum is σ = 132459288. Its totient is φ = 110382720.

The previous prime is 121420993. The next prime is 121421023. The reversal of 121421003 is 300124121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121421003 - 2¹⁶ = 121355467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121421023) 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 3 ways as a sum of consecutive naturals, for example, 5519126 + ... + 5519147.

It is an arithmetic number, because the mean of its divisors is an integer number (33114822).

Almost surely, 2^121421003 is an apocalyptic number.

121421003 is a deficient number, since it is larger than the sum of its proper divisors (11038285).

121421003 is a wasteful number, since it uses less digits than its factorization.

121421003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038284.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121421003 is about 11019.1198831849. The cubic root of 121421003 is about 495.1817215322.

Adding to 121421003 its reverse (300124121), we get a palindrome (421545124).

It can be divided in two parts, 121 and 421003, that added together give a palindrome (421124).

The spelling of 121421003 in words is "one hundred twenty-one million, four hundred twenty-one thousand, three".