21143310100403 has 4 divisors (see below), whose sum is σ = 21380875382520. Its totient is φ = 20905744818288.

The previous prime is 21143310100397. The next prime is 21143310100411. The reversal of 21143310100403 is 30400101334112.

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

It is a cyclic number.

It is not a de Polignac number, because 21143310100403 - 2³² = 21139015133107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21143310100463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118782640925 + ... + 118782641102.

It is an arithmetic number, because the mean of its divisors is an integer number (5345218845630).

Almost surely, 2^{21143310100403} is an apocalyptic number.

21143310100403 is a deficient number, since it is larger than the sum of its proper divisors (237565282117).

21143310100403 is an equidigital number, since it uses as much as digits as its factorization.

21143310100403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237565282116.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21143310100403 its reverse (30400101334112), we get a palindrome (51543411434515).

The spelling of 21143310100403 in words is "twenty-one trillion, one hundred forty-three billion, three hundred ten million, one hundred thousand, four hundred three".