21232340101 has 4 divisors (see below), whose sum is σ = 24265531552. Its totient is φ = 18199148652.

The previous prime is 21232340071. The next prime is 21232340117. The reversal of 21232340101 is 10104323212.

It is a happy number.

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 21232340101 - 2⁵ = 21232340069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232340161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516595715 + ... + 1516595728.

It is an arithmetic number, because the mean of its divisors is an integer number (6066382888).

Almost surely, 2^21232340101 is an apocalyptic number.

It is an amenable number.

21232340101 is a deficient number, since it is larger than the sum of its proper divisors (3033191451).

21232340101 is an equidigital number, since it uses as much as digits as its factorization.

21232340101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033191450.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21232340101 its reverse (10104323212), we get a palindrome (31336663313).

The spelling of 21232340101 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty thousand, one hundred one".