1213433101949 has 2 divisors, whose sum is σ = 1213433101950. Its totient is φ = 1213433101948.

The previous prime is 1213433101817. The next prime is 1213433102023. The reversal of 1213433101949 is 9491013343121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1202432868025 + 11000233924 = 1096555^2 + 104882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213433101949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213433107949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606716550974 + 606716550975.

It is an arithmetic number, because the mean of its divisors is an integer number (606716550975).

Almost surely, 2^{1213433101949} is an apocalyptic number.

It is an amenable number.

1213433101949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213433101949 is an equidigital number, since it uses as much as digits as its factorization.

1213433101949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 1213433101949 in words is "one trillion, two hundred thirteen billion, four hundred thirty-three million, one hundred one thousand, nine hundred forty-nine".