1212209949077 has 2 divisors, whose sum is σ = 1212209949078. Its totient is φ = 1212209949076.

The previous prime is 1212209949029. The next prime is 1212209949089. The reversal of 1212209949077 is 7709499022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621880496836 + 590329452241 = 788594^2 + 768329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212209949077 - 2²⁰ = 1212208900501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212209949877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606104974538 + 606104974539.

It is an arithmetic number, because the mean of its divisors is an integer number (606104974539).

Almost surely, 2^{1212209949077} is an apocalyptic number.

It is an amenable number.

1212209949077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212209949077 is an equidigital number, since it uses as much as digits as its factorization.

1212209949077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 1212209949077 in words is "one trillion, two hundred twelve billion, two hundred nine million, nine hundred forty-nine thousand, seventy-seven".