12110020981 has 2 divisors, whose sum is σ = 12110020982. Its totient is φ = 12110020980.

The previous prime is 12110020963. The next prime is 12110021029. The reversal of 12110020981 is 18902001121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7394452081 + 4715568900 = 85991^2 + 68670^2 .

It is a cyclic number.

It is not a de Polignac number, because 12110020981 - 2²⁷ = 11975803253 is a prime.

It is a super-2 number, since 2×12110020981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12110020081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055010490 + 6055010491.

It is an arithmetic number, because the mean of its divisors is an integer number (6055010491).

Almost surely, 2^12110020981 is an apocalyptic number.

It is an amenable number.

12110020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12110020981 is an equidigital number, since it uses as much as digits as its factorization.

12110020981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 12110020981 in words is "twelve billion, one hundred ten million, twenty thousand, nine hundred eighty-one".