221101011983 has 8 divisors (see below), whose sum is σ = 228754590480. Its totient is φ = 213449393920.

The previous prime is 221101011947. The next prime is 221101011991. The reversal of 221101011983 is 389110101122.

It is a happy number.

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 221101011983 - 2⁶ = 221101011919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101011083) 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, 258785 + ... + 713562.

It is an arithmetic number, because the mean of its divisors is an integer number (28594323810).

Almost surely, 2^221101011983 is an apocalyptic number.

221101011983 is a deficient number, since it is larger than the sum of its proper divisors (7653578497).

221101011983 is an equidigital number, since it uses as much as digits as its factorization.

221101011983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980217.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 221101011983 in words is "two hundred twenty-one billion, one hundred one million, eleven thousand, nine hundred eighty-three".