21401401203 has 128 divisors (see below), whose sum is σ = 41450035200. Its totient is φ = 10597257216.

The previous prime is 21401401171. The next prime is 21401401243. The reversal of 21401401203 is 30210410412.

21401401203 is a `hidden beast` number, since 21 + 40 + 1 + 401 + 203 = 666.

It is not a de Polignac number, because 21401401203 - 2⁵ = 21401401171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21401401243) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5273151 + ... + 5277207.

It is an arithmetic number, because the mean of its divisors is an integer number (323828400).

Almost surely, 2^21401401203 is an apocalyptic number.

21401401203 is a deficient number, since it is larger than the sum of its proper divisors (20048633997).

21401401203 is a wasteful number, since it uses less digits than its factorization.

21401401203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218 (or 4212 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21401401203 its reverse (30210410412), we get a palindrome (51611811615).

The spelling of 21401401203 in words is "twenty-one billion, four hundred one million, four hundred one thousand, two hundred three".