11972322881 has 2 divisors, whose sum is σ = 11972322882. Its totient is φ = 11972322880.

The previous prime is 11972322863. The next prime is 11972322907. The reversal of 11972322881 is 18822327911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8369322256 + 3603000625 = 91484^2 + 60025^2 .

It is a cyclic number.

It is not a de Polignac number, because 11972322881 - 2¹⁴ = 11972306497 is a prime.

It is a super-2 number, since 2×11972322881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11972325881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5986161440 + 5986161441.

It is an arithmetic number, because the mean of its divisors is an integer number (5986161441).

Almost surely, 2^11972322881 is an apocalyptic number.

It is an amenable number.

11972322881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11972322881 is an equidigital number, since it uses as much as digits as its factorization.

11972322881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The spelling of 11972322881 in words is "eleven billion, nine hundred seventy-two million, three hundred twenty-two thousand, eight hundred eighty-one".