12272121881 has 2 divisors, whose sum is σ = 12272121882. Its totient is φ = 12272121880.

The previous prime is 12272121871. The next prime is 12272121941. The reversal of 12272121881 is 18812127221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8894187481 + 3377934400 = 94309^2 + 58120^2 .

It is a cyclic number.

It is not a de Polignac number, because 12272121881 - 2¹⁰ = 12272120857 is a prime.

It is a super-2 number, since 2×12272121881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12272121811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6136060940 + 6136060941.

It is an arithmetic number, because the mean of its divisors is an integer number (6136060941).

Almost surely, 2^12272121881 is an apocalyptic number.

It is an amenable number.

12272121881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12272121881 is an equidigital number, since it uses as much as digits as its factorization.

12272121881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 35.

The spelling of 12272121881 in words is "twelve billion, two hundred seventy-two million, one hundred twenty-one thousand, eight hundred eighty-one".