201212003999 has 4 divisors (see below), whose sum is σ = 201212907936. Its totient is φ = 201211100064.

The previous prime is 201212003963. The next prime is 201212004041. The reversal of 201212003999 is 999300212102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 999300212102 = 2 ⋅499650106051.

It is a cyclic number.

It is not a de Polignac number, because 201212003999 - 2²⁸ = 200943568543 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 (201212003929) 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, 142967 + ... + 650279.

It is an arithmetic number, because the mean of its divisors is an integer number (50303226984).

Almost surely, 2^201212003999 is an apocalyptic number.

201212003999 is a deficient number, since it is larger than the sum of its proper divisors (903937).

201212003999 is an equidigital number, since it uses as much as digits as its factorization.

201212003999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903936.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 201212003999 in words is "two hundred one billion, two hundred twelve million, three thousand, nine hundred ninety-nine".