21342430101 has 4 divisors (see below), whose sum is σ = 28456573472. Its totient is φ = 14228286732.

The previous prime is 21342430033. The next prime is 21342430121. The reversal of 21342430101 is 10103424312.

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 de Polignac number, because none of the positive numbers 2^k-21342430101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342430121) 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, 3557071681 + ... + 3557071686.

It is an arithmetic number, because the mean of its divisors is an integer number (7114143368).

Almost surely, 2^21342430101 is an apocalyptic number.

It is an amenable number.

21342430101 is a deficient number, since it is larger than the sum of its proper divisors (7114143371).

21342430101 is an equidigital number, since it uses as much as digits as its factorization.

21342430101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114143370.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21342430101 its reverse (10103424312), we get a palindrome (31445854413).

The spelling of 21342430101 in words is "twenty-one billion, three hundred forty-two million, four hundred thirty thousand, one hundred one".