1213836399867 has 32 divisors (see below), whose sum is σ = 1994819653120. Its totient is φ = 639338676480.

The previous prime is 1213836399857. The next prime is 1213836399883. The reversal of 1213836399867 is 7689936383121.

It is not a de Polignac number, because 1213836399867 - 2¹⁰ = 1213836398843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213836399798 and 1213836399807.

It is not an unprimeable number, because it can be changed into a prime (1213836399857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3028642 + ... + 3405927.

It is an arithmetic number, because the mean of its divisors is an integer number (62338114160).

Almost surely, 2^{1213836399867} is an apocalyptic number.

1213836399867 is a deficient number, since it is larger than the sum of its proper divisors (780983253253).

1213836399867 is a wasteful number, since it uses less digits than its factorization.

1213836399867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435283.

The product of its digits is 70543872, while the sum is 66.

The spelling of 1213836399867 in words is "one trillion, two hundred thirteen billion, eight hundred thirty-six million, three hundred ninety-nine thousand, eight hundred sixty-seven".