21420321333003 has 12 divisors (see below), whose sum is σ = 31097522343888. Its totient is φ = 14207725823760.

The previous prime is 21420321332911. The next prime is 21420321333029. The reversal of 21420321333003 is 30033312302412.

21420321333003 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 0 + 321 + 3 + 330 + 0 + 3 = 666.

It is not a de Polignac number, because 21420321333003 - 2¹⁷ = 21420321201931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21420321333053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6040697983 + ... + 6040701528.

It is an arithmetic number, because the mean of its divisors is an integer number (2591460195324).

Almost surely, 2^{21420321333003} is an apocalyptic number.

21420321333003 is a deficient number, since it is larger than the sum of its proper divisors (9677201010885).

21420321333003 is a wasteful number, since it uses less digits than its factorization.

21420321333003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12081399714 (or 12081399711 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21420321333003 its reverse (30033312302412), we get a palindrome (51453633635415).

The spelling of 21420321333003 in words is "twenty-one trillion, four hundred twenty billion, three hundred twenty-one million, three hundred thirty-three thousand, three".