12021000973 has 2 divisors, whose sum is σ = 12021000974. Its totient is φ = 12021000972.

The previous prime is 12021000949. The next prime is 12021001043. The reversal of 12021000973 is 37900012021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10631053449 + 1389947524 = 103107^2 + 37282^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021000973 - 2⁹ = 12021000461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021060973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010500486 + 6010500487.

It is an arithmetic number, because the mean of its divisors is an integer number (6010500487).

Almost surely, 2^12021000973 is an apocalyptic number.

It is an amenable number.

12021000973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021000973 is an equidigital number, since it uses as much as digits as its factorization.

12021000973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

Adding to 12021000973 its reverse (37900012021), we get a palindrome (49921012994).

The spelling of 12021000973 in words is "twelve billion, twenty-one million, nine hundred seventy-three", and thus it is an aban number.