212001999999 has 4 divisors (see below), whose sum is σ = 282669333336. Its totient is φ = 141334666664.

The previous prime is 212001999961. The next prime is 212002000031. The reversal of 212001999999 is 999999100212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212001999999 - 2⁷ = 212001999871 is a prime.

212001999999 is a modest number, since divided by 999999 gives 212001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001999899) 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, 35333666664 + ... + 35333666669.

It is an arithmetic number, because the mean of its divisors is an integer number (70667333334).

Almost surely, 2^212001999999 is an apocalyptic number.

212001999999 is a deficient number, since it is larger than the sum of its proper divisors (70667333337).

212001999999 is an equidigital number, since it uses as much as digits as its factorization.

212001999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70667333336.

The product of its (nonzero) digits is 2125764, while the sum is 60.

The spelling of 212001999999 in words is "two hundred twelve billion, one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".