201213999 has 12 divisors (see below), whose sum is σ = 332162896. Its totient is φ = 114979392.

The previous prime is 201213983. The next prime is 201214001. The reversal of 201213999 is 999312102.

It is a happy number.

It is not a de Polignac number, because 201213999 - 2⁴ = 201213983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201213949) 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 11 ways as a sum of consecutive naturals, for example, 1596874 + ... + 1596999.

Almost surely, 2^201213999 is an apocalyptic number.

201213999 is a deficient number, since it is larger than the sum of its proper divisors (130948897).

201213999 is a wasteful number, since it uses less digits than its factorization.

201213999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193886 (or 3193883 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 201213999 is about 14184.9920338363. The cubic root of 201213999 is about 585.9844131099.

The spelling of 201213999 in words is "two hundred one million, two hundred thirteen thousand, nine hundred ninety-nine".