221012019983 has 4 divisors (see below), whose sum is σ = 221552392080. Its totient is φ = 220471647888.

The previous prime is 221012019967. The next prime is 221012020007. The reversal of 221012019983 is 389910210122.

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 221012019983 - 2⁴ = 221012019967 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 (221012019953) 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, 270185435 + ... + 270186252.

It is an arithmetic number, because the mean of its divisors is an integer number (55388098020).

Almost surely, 2^221012019983 is an apocalyptic number.

221012019983 is a deficient number, since it is larger than the sum of its proper divisors (540372097).

221012019983 is an equidigital number, since it uses as much as digits as its factorization.

221012019983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540372096.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 221012019983 in words is "two hundred twenty-one billion, twelve million, nineteen thousand, nine hundred eighty-three".