21401113403 has 2 divisors, whose sum is σ = 21401113404. Its totient is φ = 21401113402.

The previous prime is 21401113397. The next prime is 21401113411. The reversal of 21401113403 is 30431110412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21401113403 - 2⁴ = 21401113387 is a prime.

It is not a weakly prime, because it can be changed into another prime (21401113423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700556701 + 10700556702.

It is an arithmetic number, because the mean of its divisors is an integer number (10700556702).

Almost surely, 2^21401113403 is an apocalyptic number.

21401113403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21401113403 is an equidigital number, since it uses as much as digits as its factorization.

21401113403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21401113403 its reverse (30431110412), we get a palindrome (51832223815).

The spelling of 21401113403 in words is "twenty-one billion, four hundred one million, one hundred thirteen thousand, four hundred three".