201212219999 has 4 divisors (see below), whose sum is σ = 229956822864. Its totient is φ = 172467617136.

The previous prime is 201212219983. The next prime is 201212220019. The reversal of 201212219999 is 999912212102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999912212102 = 2 ⋅499956106051.

It is a cyclic number.

It is not a de Polignac number, because 201212219999 - 2⁴ = 201212219983 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 (201212219909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14372301422 + ... + 14372301435.

It is an arithmetic number, because the mean of its divisors is an integer number (57489205716).

Almost surely, 2^201212219999 is an apocalyptic number.

201212219999 is a deficient number, since it is larger than the sum of its proper divisors (28744602865).

201212219999 is an equidigital number, since it uses as much as digits as its factorization.

201212219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28744602864.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 201212219999 in words is "two hundred one billion, two hundred twelve million, two hundred nineteen thousand, nine hundred ninety-nine".