221330102021 has 4 divisors (see below), whose sum is σ = 252948688032. Its totient is φ = 189711516012.

The previous prime is 221330102009. The next prime is 221330102083. The reversal of 221330102021 is 120201033122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221330102021 - 2⁶ = 221330101957 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 (221330102221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15809292995 + ... + 15809293008.

It is an arithmetic number, because the mean of its divisors is an integer number (63237172008).

Almost surely, 2^221330102021 is an apocalyptic number.

It is an amenable number.

221330102021 is a deficient number, since it is larger than the sum of its proper divisors (31618586011).

221330102021 is an equidigital number, since it uses as much as digits as its factorization.

221330102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31618586010.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221330102021 its reverse (120201033122), we get a palindrome (341531135143).

The spelling of 221330102021 in words is "two hundred twenty-one billion, three hundred thirty million, one hundred two thousand, twenty-one".