221120002021 has 8 divisors (see below), whose sum is σ = 233820050688. Its totient is φ = 208767900000.

The previous prime is 221120002003. The next prime is 221120002039. The reversal of 221120002021 is 120200021122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221120002003) and next prime (221120002039).

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

It is not a de Polignac number, because 221120002021 - 2⁵ = 221120001989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120001992 and 221120002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120002091) 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, 86985355 + ... + 86987896.

It is an arithmetic number, because the mean of its divisors is an integer number (29227506336).

Almost surely, 2^221120002021 is an apocalyptic number.

It is an amenable number.

221120002021 is a deficient number, since it is larger than the sum of its proper divisors (12700048667).

221120002021 is a wasteful number, since it uses less digits than its factorization.

221120002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173973323.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221120002021 its reverse (120200021122), we get a palindrome (341320023143).

The spelling of 221120002021 in words is "two hundred twenty-one billion, one hundred twenty million, two thousand, twenty-one".