1213409019843 has 8 divisors (see below), whose sum is σ = 1797642992400. Its totient is φ = 808939346544.

The previous prime is 1213409019803. The next prime is 1213409019859. The reversal of 1213409019843 is 3489109043121.

1213409019843 is a `hidden beast` number, since 1 + 2 + 13 + 409 + 0 + 198 + 43 = 666.

It is not a de Polignac number, because 1213409019843 - 2²⁵ = 1213375465411 is a prime.

It is a super-2 number, since 2×1213409019843² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213409019803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22470537378 + ... + 22470537431.

It is an arithmetic number, because the mean of its divisors is an integer number (224705374050).

Almost surely, 2^{1213409019843} is an apocalyptic number.

1213409019843 is a deficient number, since it is larger than the sum of its proper divisors (584233972557).

1213409019843 is an equidigital number, since it uses as much as digits as its factorization.

1213409019843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44941074818 (or 44941074812 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 1213409019843 in words is "one trillion, two hundred thirteen billion, four hundred nine million, nineteen thousand, eight hundred forty-three".