21101230005 has 8 divisors (see below), whose sum is σ = 33761968032. Its totient is φ = 11253989328.

The previous prime is 21101229979. The next prime is 21101230013. The reversal of 21101230005 is 50003210112.

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

It is not a de Polignac number, because 21101230005 - 2²⁰ = 21100181429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1406748667 = 21101230005 / (2 + 1 + 1 + 0 + 1 + 2 + 3 + 0 + 0 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703374319 + ... + 703374348.

It is an arithmetic number, because the mean of its divisors is an integer number (4220246004).

Almost surely, 2^21101230005 is an apocalyptic number.

It is an amenable number.

21101230005 is a deficient number, since it is larger than the sum of its proper divisors (12660738027).

21101230005 is a wasteful number, since it uses less digits than its factorization.

21101230005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406748675.

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 21101230005 its reverse (50003210112), we get a palindrome (71104440117).

The spelling of 21101230005 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, five".