21340213101 has 56 divisors (see below), whose sum is σ = 34971243264. Its totient is φ = 12957770880.

The previous prime is 21340213091. The next prime is 21340213121. The reversal of 21340213101 is 10131204312.

It is not a de Polignac number, because 21340213101 - 2⁹ = 21340212589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340213121) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 356410 + ... + 411956.

Almost surely, 2^21340213101 is an apocalyptic number.

It is an amenable number.

21340213101 is a deficient number, since it is larger than the sum of its proper divisors (13631030163).

21340213101 is an equidigital number, since it uses as much as digits as its factorization.

21340213101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55613 (or 55598 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21340213101 its reverse (10131204312), we get a palindrome (31471417413).

The spelling of 21340213101 in words is "twenty-one billion, three hundred forty million, two hundred thirteen thousand, one hundred one".