12001822681 has 2 divisors, whose sum is σ = 12001822682. Its totient is φ = 12001822680.

The previous prime is 12001822633. The next prime is 12001822687. The reversal of 12001822681 is 18622810021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11981491600 + 20331081 = 109460^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001822681 - 2²³ = 11993434073 is a prime.

It is a super-2 number, since 2×12001822681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12001822687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000911340 + 6000911341.

It is an arithmetic number, because the mean of its divisors is an integer number (6000911341).

Almost surely, 2^12001822681 is an apocalyptic number.

It is an amenable number.

12001822681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001822681 is an equidigital number, since it uses as much as digits as its factorization.

12001822681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 12001822681 in words is "twelve billion, one million, eight hundred twenty-two thousand, six hundred eighty-one".