421011440403 has 16 divisors (see below), whose sum is σ = 567064875936. Its totient is φ = 277817702400.

The previous prime is 421011440371. The next prime is 421011440449. The reversal of 421011440403 is 304044110124.

It is not a de Polignac number, because 421011440403 - 2⁵ = 421011440371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421011440453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 902451 + ... + 1287027.

It is an arithmetic number, because the mean of its divisors is an integer number (35441554746).

Almost surely, 2^421011440403 is an apocalyptic number.

421011440403 is a deficient number, since it is larger than the sum of its proper divisors (146053435533).

421011440403 is a wasteful number, since it uses less digits than its factorization.

421011440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388294.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 421011440403 its reverse (304044110124), we get a palindrome (725055550527).

The spelling of 421011440403 in words is "four hundred twenty-one billion, eleven million, four hundred forty thousand, four hundred three".