212019999 has 8 divisors (see below), whose sum is σ = 282761472. Its totient is φ = 141312600.

The previous prime is 212019989. The next prime is 212020001. The reversal of 212019999 is 999910212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212019999 - 2²³ = 203631391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212019999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212019989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16512 + ... + 26394.

It is an arithmetic number, because the mean of its divisors is an integer number (35345184).

Almost surely, 2^212019999 is an apocalyptic number.

212019999 is a deficient number, since it is larger than the sum of its proper divisors (70741473).

212019999 is an equidigital number, since it uses as much as digits as its factorization.

212019999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17037.

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 212019999 is about 14560.9065308448. The cubic root of 212019999 is about 596.2919449767.

The spelling of 212019999 in words is "two hundred twelve million, nineteen thousand, nine hundred ninety-nine".