21424034201 has 4 divisors (see below), whose sum is σ = 21424372992. Its totient is φ = 21423695412.

The previous prime is 21424034167. The next prime is 21424034207. The reversal of 21424034201 is 10243042412.

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 21424034201 - 2¹⁴ = 21424017817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424034207) 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, 43205 + ... + 211458.

It is an arithmetic number, because the mean of its divisors is an integer number (5356093248).

Almost surely, 2^21424034201 is an apocalyptic number.

It is an amenable number.

21424034201 is a deficient number, since it is larger than the sum of its proper divisors (338791).

21424034201 is an equidigital number, since it uses as much as digits as its factorization.

21424034201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338790.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21424034201 its reverse (10243042412), we get a palindrome (31667076613).

The spelling of 21424034201 in words is "twenty-one billion, four hundred twenty-four million, thirty-four thousand, two hundred one".