21443302103 has 2 divisors, whose sum is σ = 21443302104. Its totient is φ = 21443302102.

The previous prime is 21443302091. The next prime is 21443302183. The reversal of 21443302103 is 30120334412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21443302103 - 2¹⁴ = 21443285719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21443302183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721651051 + 10721651052.

It is an arithmetic number, because the mean of its divisors is an integer number (10721651052).

Almost surely, 2^21443302103 is an apocalyptic number.

21443302103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21443302103 is an equidigital number, since it uses as much as digits as its factorization.

21443302103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21443302103 its reverse (30120334412), we get a palindrome (51563636515).

The spelling of 21443302103 in words is "twenty-one billion, four hundred forty-three million, three hundred two thousand, one hundred three".