1213610591899 has 16 divisors (see below), whose sum is σ = 1316650489056. Its totient is φ = 1114100582400.

The previous prime is 1213610591857. The next prime is 1213610591911. The reversal of 1213610591899 is 9981950163121.

It is a cyclic number.

It is not a de Polignac number, because 1213610591899 - 2¹⁵ = 1213610559131 is a prime.

It is a super-2 number, since 2×1213610591899² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213640591899) 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 15 ways as a sum of consecutive naturals, for example, 2792404 + ... + 3197614.

It is an arithmetic number, because the mean of its divisors is an integer number (82290655566).

Almost surely, 2^{1213610591899} is an apocalyptic number.

1213610591899 is a deficient number, since it is larger than the sum of its proper divisors (103039897157).

1213610591899 is a wasteful number, since it uses less digits than its factorization.

1213610591899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409566.

The product of its (nonzero) digits is 1049760, while the sum is 55.

The spelling of 1213610591899 in words is "one trillion, two hundred thirteen billion, six hundred ten million, five hundred ninety-one thousand, eight hundred ninety-nine".