21343201235 has 4 divisors (see below), whose sum is σ = 25611841488. Its totient is φ = 17074560984.

The previous prime is 21343201223. The next prime is 21343201267. The reversal of 21343201235 is 53210234312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21343201235 - 2²⁸ = 21074765779 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134320119 + ... + 2134320128.

It is an arithmetic number, because the mean of its divisors is an integer number (6402960372).

Almost surely, 2^21343201235 is an apocalyptic number.

21343201235 is a deficient number, since it is larger than the sum of its proper divisors (4268640253).

21343201235 is an equidigital number, since it uses as much as digits as its factorization.

21343201235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268640252.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21343201235 its reverse (53210234312), we get a palindrome (74553435547).

The spelling of 21343201235 in words is "twenty-one billion, three hundred forty-three million, two hundred one thousand, two hundred thirty-five".