21122272715 has 8 divisors (see below), whose sum is σ = 25392236400. Its totient is φ = 16867478752.

The previous prime is 21122272711. The next prime is 21122272753. The reversal of 21122272715 is 51727222112.

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

It is a cyclic number.

It is not a de Polignac number, because 21122272715 - 2² = 21122272711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21122272711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3789365 + ... + 3794934.

It is an arithmetic number, because the mean of its divisors is an integer number (3174029550).

Almost surely, 2^21122272715 is an apocalyptic number.

21122272715 is a deficient number, since it is larger than the sum of its proper divisors (4269963685).

21122272715 is an equidigital number, since it uses as much as digits as its factorization.

21122272715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584861.

The product of its digits is 7840, while the sum is 32.

Adding to 21122272715 its reverse (51727222112), we get a palindrome (72849494827).

The spelling of 21122272715 in words is "twenty-one billion, one hundred twenty-two million, two hundred seventy-two thousand, seven hundred fifteen".