21342003101 has 4 divisors (see below), whose sum is σ = 21862539804. Its totient is φ = 20821466400.

The previous prime is 21342003097. The next prime is 21342003113. The reversal of 21342003101 is 10130024312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12106600900 + 9235402201 = 110030^2 + 96101^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342003101 - 2² = 21342003097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21342003101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342003191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260268290 + ... + 260268371.

It is an arithmetic number, because the mean of its divisors is an integer number (5465634951).

Almost surely, 2^21342003101 is an apocalyptic number.

It is an amenable number.

21342003101 is a deficient number, since it is larger than the sum of its proper divisors (520536703).

21342003101 is an equidigital number, since it uses as much as digits as its factorization.

21342003101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520536702.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21342003101 its reverse (10130024312), we get a palindrome (31472027413).

The spelling of 21342003101 in words is "twenty-one billion, three hundred forty-two million, three thousand, one hundred one".