1212351758099 has 4 divisors (see below), whose sum is σ = 1251459879360. Its totient is φ = 1173243636840.

The previous prime is 1212351758081. The next prime is 1212351758113. The reversal of 1212351758099 is 9908571532121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212351758099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212351758099.

It is not an unprimeable number, because it can be changed into a prime (1212351758039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19554060584 + ... + 19554060645.

It is an arithmetic number, because the mean of its divisors is an integer number (312864969840).

Almost surely, 2^{1212351758099} is an apocalyptic number.

1212351758099 is a deficient number, since it is larger than the sum of its proper divisors (39108121261).

1212351758099 is an equidigital number, since it uses as much as digits as its factorization.

1212351758099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39108121260.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 1212351758099 in words is "one trillion, two hundred twelve billion, three hundred fifty-one million, seven hundred fifty-eight thousand, ninety-nine".