21143140213 has 16 divisors (see below), whose sum is σ = 22970085376. Its totient is φ = 19345132800.

The previous prime is 21143140201. The next prime is 21143140217. The reversal of 21143140213 is 31204134112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21143140213 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 (21143140217) 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, 1977520 + ... + 1988182.

It is an arithmetic number, because the mean of its divisors is an integer number (1435630336).

Almost surely, 2^21143140213 is an apocalyptic number.

It is an amenable number.

21143140213 is a deficient number, since it is larger than the sum of its proper divisors (1826945163).

21143140213 is a wasteful number, since it uses less digits than its factorization.

21143140213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21143140213 its reverse (31204134112), we get a palindrome (52347274325).

The spelling of 21143140213 in words is "twenty-one billion, one hundred forty-three million, one hundred forty thousand, two hundred thirteen".