21343222143 has 8 divisors (see below), whose sum is σ = 31619588400. Its totient is φ = 14228814744.

The previous prime is 21343222111. The next prime is 21343222171. The reversal of 21343222143 is 34122234312.

21343222143 is a `hidden beast` number, since 2 + 1 + 3 + 432 + 221 + 4 + 3 = 666.

It is not a de Polignac number, because 21343222143 - 2⁵ = 21343222111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 790489709 = 21343222143 / (2 + 1 + 3 + 4 + 3 + 2 + 2 + 2 + 1 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343222183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395244828 + ... + 395244881.

It is an arithmetic number, because the mean of its divisors is an integer number (3952448550).

Almost surely, 2^21343222143 is an apocalyptic number.

21343222143 is a deficient number, since it is larger than the sum of its proper divisors (10276366257).

21343222143 is an equidigital number, since it uses as much as digits as its factorization.

21343222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790489718 (or 790489712 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21343222143 its reverse (34122234312), we get a palindrome (55465456455).

The spelling of 21343222143 in words is "twenty-one billion, three hundred forty-three million, two hundred twenty-two thousand, one hundred forty-three".