21301254005 has 8 divisors (see below), whose sum is σ = 25814589624. Its totient is φ = 16872280000.

The previous prime is 21301253999. The next prime is 21301254011. The reversal of 21301254005 is 50045210312.

It is an interprime number because it is at equal distance from previous prime (21301253999) and next prime (21301254011).

It can be written as a sum of positive squares in 4 ways, for example, as 7124541649 + 14176712356 = 84407^2 + 119066^2 .

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

It is not a de Polignac number, because 21301254005 - 2⁸ = 21301253749 is a prime.

It is a Duffinian 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, 21089846 + ... + 21090855.

It is an arithmetic number, because the mean of its divisors is an integer number (3226823703).

Almost surely, 2^21301254005 is an apocalyptic number.

It is an amenable number.

21301254005 is a deficient number, since it is larger than the sum of its proper divisors (4513335619).

21301254005 is a wasteful number, since it uses less digits than its factorization.

21301254005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42180807.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21301254005 its reverse (50045210312), we get a palindrome (71346464317).

The spelling of 21301254005 in words is "twenty-one billion, three hundred one million, two hundred fifty-four thousand, five".