201212011999 has 4 divisors (see below), whose sum is σ = 201440403360. Its totient is φ = 200983620640.

The previous prime is 201212011997. The next prime is 201212012041. The reversal of 201212011999 is 999110212102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999110212102 = 2 ⋅499555106051.

It is a cyclic number.

It is not a de Polignac number, because 201212011999 - 2¹ = 201212011997 is a prime.

It is a super-3 number, since 3×201212011999³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212011997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114194359 + ... + 114196120.

It is an arithmetic number, because the mean of its divisors is an integer number (50360100840).

Almost surely, 2^201212011999 is an apocalyptic number.

201212011999 is a deficient number, since it is larger than the sum of its proper divisors (228391361).

201212011999 is an equidigital number, since it uses as much as digits as its factorization.

201212011999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228391360.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 201212011999 in words is "two hundred one billion, two hundred twelve million, eleven thousand, nine hundred ninety-nine".