21301012443 has 16 divisors (see below), whose sum is σ = 29568539936. Its totient is φ = 13627595520.

The previous prime is 21301012429. The next prime is 21301012463. The reversal of 21301012443 is 34421010312.

It is not a de Polignac number, because 21301012443 - 2¹⁰ = 21301011419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21301012463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1306288 + ... + 1322493.

It is an arithmetic number, because the mean of its divisors is an integer number (1848033746).

Almost surely, 2^21301012443 is an apocalyptic number.

21301012443 is a deficient number, since it is larger than the sum of its proper divisors (8267527493).

21301012443 is a wasteful number, since it uses less digits than its factorization.

21301012443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628894.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21301012443 its reverse (34421010312), we get a palindrome (55722022755).

The spelling of 21301012443 in words is "twenty-one billion, three hundred one million, twelve thousand, four hundred forty-three".