12001220210977 has 2 divisors, whose sum is σ = 12001220210978. Its totient is φ = 12001220210976.

The previous prime is 12001220210971. The next prime is 12001220211061. The reversal of 12001220210977 is 77901202210021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12001069633536 + 150577441 = 3464256^2 + 12271^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001220210977 - 2³⁹ = 11451464397089 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001220210971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000610105488 + 6000610105489.

It is an arithmetic number, because the mean of its divisors is an integer number (6000610105489).

Almost surely, 2^{12001220210977} is an apocalyptic number.

It is an amenable number.

12001220210977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001220210977 is an equidigital number, since it uses as much as digits as its factorization.

12001220210977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

Adding to 12001220210977 its reverse (77901202210021), we get a palindrome (89902422420998).

The spelling of 12001220210977 in words is "twelve trillion, one billion, two hundred twenty million, two hundred ten thousand, nine hundred seventy-seven".