1212052757838 has 32 divisors (see below), whose sum is σ = 2654822217600. Its totient is φ = 366618303456.

The previous prime is 1212052757831. The next prime is 1212052757849. The reversal of 1212052757838 is 8387572502121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212052757831) 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 in 15 ways as a sum of consecutive naturals, for example, 131683008 + ... + 131692211.

It is an arithmetic number, because the mean of its divisors is an integer number (82963194300).

Almost surely, 2^{1212052757838} is an apocalyptic number.

1212052757838 is an abundant number, since it is smaller than the sum of its proper divisors (1442769459762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212052757838 is a wasteful number, since it uses less digits than its factorization.

1212052757838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263375296.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 1212052757838 in words is "one trillion, two hundred twelve billion, fifty-two million, seven hundred fifty-seven thousand, eight hundred thirty-eight".