21231301143 has 16 divisors (see below), whose sum is σ = 30495342080. Its totient is φ = 13061399904.

The previous prime is 21231301141. The next prime is 21231301153. The reversal of 21231301143 is 34110313212.

It is not a de Polignac number, because 21231301143 - 2¹ = 21231301141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231301141) 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, 47430 + ... + 211452.

It is an arithmetic number, because the mean of its divisors is an integer number (1905958880).

Almost surely, 2^21231301143 is an apocalyptic number.

21231301143 is a deficient number, since it is larger than the sum of its proper divisors (9264040937).

21231301143 is a wasteful number, since it uses less digits than its factorization.

21231301143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167358.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21231301143 its reverse (34110313212), we get a palindrome (55341614355).

The spelling of 21231301143 in words is "twenty-one billion, two hundred thirty-one million, three hundred one thousand, one hundred forty-three".