21194599113 has 6 divisors (see below), whose sum is σ = 30614420954. Its totient is φ = 14129732736.

The previous prime is 21194599103. The next prime is 21194599117. The reversal of 21194599113 is 31199549112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15954721344 + 5239877769 = 126312^2 + 72387^2 .

It is not a de Polignac number, because 21194599113 - 2¹² = 21194595017 is a prime.

It is a super-2 number, since 2×21194599113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21194599117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1177477720 + ... + 1177477737.

Almost surely, 2^21194599113 is an apocalyptic number.

It is an amenable number.

21194599113 is a deficient number, since it is larger than the sum of its proper divisors (9419821841).

21194599113 is a wasteful number, since it uses less digits than its factorization.

21194599113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354955463 (or 2354955460 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The spelling of 21194599113 in words is "twenty-one billion, one hundred ninety-four million, five hundred ninety-nine thousand, one hundred thirteen".