20021012219999 has 8 divisors (see below), whose sum is σ = 22881325360800. Its totient is φ = 17160741213696.

The previous prime is 20021012219963. The next prime is 20021012220031. The reversal of 20021012219999 is 99991221012002.

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

It is a cyclic number.

It is not a de Polignac number, because 20021012219999 - 2¹⁶ = 20021012154463 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 (20021012219699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9508754 + ... + 11421839.

It is an arithmetic number, because the mean of its divisors is an integer number (2860165670100).

Almost surely, 2^{20021012219999} is an apocalyptic number.

20021012219999 is a deficient number, since it is larger than the sum of its proper divisors (2860313140801).

20021012219999 is a wasteful number, since it uses less digits than its factorization.

20021012219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21067249.

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

The spelling of 20021012219999 in words is "twenty trillion, twenty-one billion, twelve million, two hundred nineteen thousand, nine hundred ninety-nine".