12021110081 has 2 divisors, whose sum is σ = 12021110082. Its totient is φ = 12021110080.

The previous prime is 12021110063. The next prime is 12021110137. The reversal of 12021110081 is 18001112021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11997916225 + 23193856 = 109535^2 + 4816^2 .

It is an emirp because it is prime and its reverse (18001112021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021110081 - 2²⁶ = 11954001217 is a prime.

It is a super-2 number, since 2×12021110081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12023110081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010555040 + 6010555041.

It is an arithmetic number, because the mean of its divisors is an integer number (6010555041).

Almost surely, 2^12021110081 is an apocalyptic number.

It is an amenable number.

12021110081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021110081 is an equidigital number, since it uses as much as digits as its factorization.

12021110081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

The spelling of 12021110081 in words is "twelve billion, twenty-one million, one hundred ten thousand, eighty-one".