21342043201 has 4 divisors (see below), whose sum is σ = 21345978304. Its totient is φ = 21338108100.

The previous prime is 21342043193. The next prime is 21342043211. The reversal of 21342043201 is 10234024312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21342043201 - 2³ = 21342043193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342043211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959405 + ... + 1970266.

It is an arithmetic number, because the mean of its divisors is an integer number (5336494576).

Almost surely, 2^21342043201 is an apocalyptic number.

It is an amenable number.

21342043201 is a deficient number, since it is larger than the sum of its proper divisors (3935103).

21342043201 is an equidigital number, since it uses as much as digits as its factorization.

21342043201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935102.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21342043201 its reverse (10234024312), we get a palindrome (31576067513).

The spelling of 21342043201 in words is "twenty-one billion, three hundred forty-two million, forty-three thousand, two hundred one".