12021111111973 has 2 divisors, whose sum is σ = 12021111111974. Its totient is φ = 12021111111972.

The previous prime is 12021111111949. The next prime is 12021111112039. The reversal of 12021111111973 is 37911111112021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7499015295489 + 4522095816484 = 2738433^2 + 2126522^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021111111973 - 2²⁹ = 12020574241061 is a prime.

It is a super-2 number, since 2×12021111111973² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021111111073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010555555986 + 6010555555987.

It is an arithmetic number, because the mean of its divisors is an integer number (6010555555987).

Almost surely, 2^{12021111111973} is an apocalyptic number.

It is an amenable number.

12021111111973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021111111973 is an equidigital number, since it uses as much as digits as its factorization.

12021111111973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 31.

Adding to 12021111111973 its reverse (37911111112021), we get a palindrome (49932222223994).

The spelling of 12021111111973 in words is "twelve trillion, twenty-one billion, one hundred eleven million, one hundred eleven thousand, nine hundred seventy-three".