120421204403 has 16 divisors (see below), whose sum is σ = 129626814240. Its totient is φ = 111457099776.

The previous prime is 120421204399. The next prime is 120421204481. The reversal of 120421204403 is 304402124021.

It is a cyclic number.

It is not a de Polignac number, because 120421204403 - 2² = 120421204399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120421204303) 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 15 ways as a sum of consecutive naturals, for example, 586283 + ... + 764571.

It is an arithmetic number, because the mean of its divisors is an integer number (8101675890).

Almost surely, 2^120421204403 is an apocalyptic number.

120421204403 is a deficient number, since it is larger than the sum of its proper divisors (9205609837).

120421204403 is a wasteful number, since it uses less digits than its factorization.

120421204403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178966.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 120421204403 its reverse (304402124021), we get a palindrome (424823328424).

The spelling of 120421204403 in words is "one hundred twenty billion, four hundred twenty-one million, two hundred four thousand, four hundred three".