2215231211999 has 16 divisors (see below), whose sum is σ = 2521700428800. Its totient is φ = 1929100725216.

The previous prime is 2215231211957. The next prime is 2215231212091. The reversal of 2215231211999 is 9991121325122.

It is a cyclic number.

It is not a de Polignac number, because 2215231211999 - 2²⁰ = 2215230163423 is a prime.

It is a super-2 number, since 2×2215231211999² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215231217999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18703619 + ... + 18821684.

It is an arithmetic number, because the mean of its divisors is an integer number (157606276800).

Almost surely, 2^{2215231211999} is an apocalyptic number.

2215231211999 is a deficient number, since it is larger than the sum of its proper divisors (306469216801).

2215231211999 is a wasteful number, since it uses less digits than its factorization.

2215231211999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37525574.

The product of its digits is 174960, while the sum is 47.

The spelling of 2215231211999 in words is "two trillion, two hundred fifteen billion, two hundred thirty-one million, two hundred eleven thousand, nine hundred ninety-nine".