12021200977 has 2 divisors, whose sum is σ = 12021200978. Its totient is φ = 12021200976.

The previous prime is 12021200969. The next prime is 12021201043. The reversal of 12021200977 is 77900212021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10849097281 + 1172103696 = 104159^2 + 34236^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021200977 - 2³ = 12021200969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021200077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010600488 + 6010600489.

It is an arithmetic number, because the mean of its divisors is an integer number (6010600489).

Almost surely, 2^12021200977 is an apocalyptic number.

It is an amenable number.

12021200977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021200977 is an equidigital number, since it uses as much as digits as its factorization.

12021200977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

Adding to 12021200977 its reverse (77900212021), we get a palindrome (89921412998).

The spelling of 12021200977 in words is "twelve billion, twenty-one million, two hundred thousand, nine hundred seventy-seven".