1212055645399 has 2 divisors, whose sum is σ = 1212055645400. Its totient is φ = 1212055645398.

The previous prime is 1212055645253. The next prime is 1212055645433. The reversal of 1212055645399 is 9935465502121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212055645399 - 2¹⁹ = 1212055121111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212055445399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606027822699 + 606027822700.

It is an arithmetic number, because the mean of its divisors is an integer number (606027822700).

Almost surely, 2^{1212055645399} is an apocalyptic number.

1212055645399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212055645399 is an equidigital number, since it uses as much as digits as its factorization.

1212055645399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 1212055645399 in words is "one trillion, two hundred twelve billion, fifty-five million, six hundred forty-five thousand, three hundred ninety-nine".