12210100081 has 2 divisors, whose sum is σ = 12210100082. Its totient is φ = 12210100080.

The previous prime is 12210100013. The next prime is 12210100109. The reversal of 12210100081 is 18000101221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12191472225 + 18627856 = 110415^2 + 4316^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210100081 - 2⁹ = 12210099569 is a prime.

It is a super-2 number, since 2×12210100081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12210100481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105050040 + 6105050041.

It is an arithmetic number, because the mean of its divisors is an integer number (6105050041).

Almost surely, 2^12210100081 is an apocalyptic number.

It is an amenable number.

12210100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210100081 is an equidigital number, since it uses as much as digits as its factorization.

12210100081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

The spelling of 12210100081 in words is "twelve billion, two hundred ten million, one hundred thousand, eighty-one".