421421433120403 has 4 divisors (see below), whose sum is σ = 421421549405560. Its totient is φ = 421421316835248.

The previous prime is 421421433120343. The next prime is 421421433120439. The reversal of 421421433120403 is 304021334124124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421421433120403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421421433120703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52525650 + ... + 60014887.

It is an arithmetic number, because the mean of its divisors is an integer number (105355387351390).

Almost surely, 2^{421421433120403} is an apocalyptic number.

421421433120403 is a deficient number, since it is larger than the sum of its proper divisors (116285157).

421421433120403 is a wasteful number, since it uses less digits than its factorization.

421421433120403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116285156.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 421421433120403 its reverse (304021334124124), we get a palindrome (725442767244527).

The spelling of 421421433120403 in words is "four hundred twenty-one trillion, four hundred twenty-one billion, four hundred thirty-three million, one hundred twenty thousand, four hundred three".