1213012320977 has 2 divisors, whose sum is σ = 1213012320978. Its totient is φ = 1213012320976.

The previous prime is 1213012320959. The next prime is 1213012321007. The reversal of 1213012320977 is 7790232103121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994296156736 + 218716164241 = 997144^2 + 467671^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213012320977 - 2⁶ = 1213012320913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213012320977.

It is not a weakly prime, because it can be changed into another prime (1213012320577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606506160488 + 606506160489.

It is an arithmetic number, because the mean of its divisors is an integer number (606506160489).

Almost surely, 2^{1213012320977} is an apocalyptic number.

It is an amenable number.

1213012320977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213012320977 is an equidigital number, since it uses as much as digits as its factorization.

1213012320977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 1213012320977 in words is "one trillion, two hundred thirteen billion, twelve million, three hundred twenty thousand, nine hundred seventy-seven".