12272699921 has 8 divisors (see below), whose sum is σ = 12869815080. Its totient is φ = 11687179392.

The previous prime is 12272699899. The next prime is 12272699947. The reversal of 12272699921 is 12999627221.

It can be written as a sum of positive squares in 4 ways, for example, as 4358640400 + 7914059521 = 66020^2 + 88961^2 .

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 12272699921 - 2¹⁸ = 12272437777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12272699921.

It is not an unprimeable number, because it can be changed into a prime (12272699321) 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, 2896490 + ... + 2900723.

It is an arithmetic number, because the mean of its divisors is an integer number (1608726885).

Almost surely, 2^12272699921 is an apocalyptic number.

It is an amenable number.

12272699921 is a deficient number, since it is larger than the sum of its proper divisors (597115159).

12272699921 is an equidigital number, since it uses as much as digits as its factorization.

12272699921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797315.

The product of its digits is 489888, while the sum is 50.

The spelling of 12272699921 in words is "twelve billion, two hundred seventy-two million, six hundred ninety-nine thousand, nine hundred twenty-one".