21641301113 has 4 divisors (see below), whose sum is σ = 21644907408. Its totient is φ = 21637694820.

The previous prime is 21641301089. The next prime is 21641301137. The reversal of 21641301113 is 31110314612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21641301089) and next prime (21641301137).

It is a cyclic number.

It is not a de Polignac number, because 21641301113 - 2¹² = 21641297017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21641301163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1794131 + ... + 1806152.

It is an arithmetic number, because the mean of its divisors is an integer number (5411226852).

Almost surely, 2^21641301113 is an apocalyptic number.

It is an amenable number.

21641301113 is a deficient number, since it is larger than the sum of its proper divisors (3606295).

21641301113 is an equidigital number, since it uses as much as digits as its factorization.

21641301113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606294.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21641301113 its reverse (31110314612), we get a palindrome (52751615725).

The spelling of 21641301113 in words is "twenty-one billion, six hundred forty-one million, three hundred one thousand, one hundred thirteen".