1213444312049 has 2 divisors, whose sum is σ = 1213444312050. Its totient is φ = 1213444312048.

The previous prime is 1213444312021. The next prime is 1213444312081. The reversal of 1213444312049 is 9402134443121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1213434433600 + 9878449 = 1101560^2 + 3143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213444312049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1213444318049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606722156024 + 606722156025.

It is an arithmetic number, because the mean of its divisors is an integer number (606722156025).

Almost surely, 2^{1213444312049} is an apocalyptic number.

It is an amenable number.

1213444312049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213444312049 is an equidigital number, since it uses as much as digits as its factorization.

1213444312049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 1213444312049 in words is "one trillion, two hundred thirteen billion, four hundred forty-four million, three hundred twelve thousand, forty-nine".