1213388446387 has 4 divisors (see below), whose sum is σ = 1306726019200. Its totient is φ = 1120050873576.

The previous prime is 1213388446379. The next prime is 1213388446393. The reversal of 1213388446387 is 7836448833121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213388446387 - 2³ = 1213388446379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213388443387) 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, 46668786387 + ... + 46668786412.

It is an arithmetic number, because the mean of its divisors is an integer number (326681504800).

Almost surely, 2^{1213388446387} is an apocalyptic number.

1213388446387 is a deficient number, since it is larger than the sum of its proper divisors (93337572813).

1213388446387 is an equidigital number, since it uses as much as digits as its factorization.

1213388446387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93337572812.

The product of its digits is 18579456, while the sum is 58.

The spelling of 1213388446387 in words is "one trillion, two hundred thirteen billion, three hundred eighty-eight million, four hundred forty-six thousand, three hundred eighty-seven".