212111019979 has 8 divisors (see below), whose sum is σ = 214083072000. Its totient is φ = 210145340712.

The previous prime is 212111019917. The next prime is 212111020013. The reversal of 212111019979 is 979910111212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212111019979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212111719979) 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, 1526299 + ... + 1659460.

It is an arithmetic number, because the mean of its divisors is an integer number (26760384000).

Almost surely, 2^212111019979 is an apocalyptic number.

212111019979 is a deficient number, since it is larger than the sum of its proper divisors (1972052021).

212111019979 is a wasteful number, since it uses less digits than its factorization.

212111019979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186377.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 212111019979 in words is "two hundred twelve billion, one hundred eleven million, nineteen thousand, nine hundred seventy-nine".