21195357115 has 12 divisors (see below), whose sum is σ = 25978322016. Its totient is φ = 16593766208.

The previous prime is 21195357103. The next prime is 21195357137. The reversal of 21195357115 is 51175359112.

It is not a de Polignac number, because 21195357115 - 2⁹ = 21195356603 is a prime.

It is a super-2 number, since 2×21195357115² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2227047 + ... + 2236543.

It is an arithmetic number, because the mean of its divisors is an integer number (2164860168).

Almost surely, 2^21195357115 is an apocalyptic number.

21195357115 is a deficient number, since it is larger than the sum of its proper divisors (4782964901).

21195357115 is an frugal number, since it uses more digits than its factorization.

21195357115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19046 (or 9549 counting only the distinct ones).

The product of its digits is 47250, while the sum is 40.

The spelling of 21195357115 in words is "twenty-one billion, one hundred ninety-five million, three hundred fifty-seven thousand, one hundred fifteen".