21240314105 has 8 divisors (see below), whose sum is σ = 25489169664. Its totient is φ = 16991722800.

The previous prime is 21240314101. The next prime is 21240314107. The reversal of 21240314105 is 50141304212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21240314105 - 2² = 21240314101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21240314101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238040 + ... + 314870.

It is an arithmetic number, because the mean of its divisors is an integer number (3186146208).

Almost surely, 2^21240314105 is an apocalyptic number.

It is an amenable number.

21240314105 is a deficient number, since it is larger than the sum of its proper divisors (4248855559).

21240314105 is an equidigital number, since it uses as much as digits as its factorization.

21240314105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132127.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21240314105 its reverse (50141304212), we get a palindrome (71381618317).

The spelling of 21240314105 in words is "twenty-one billion, two hundred forty million, three hundred fourteen thousand, one hundred five".