221002222221021 has 8 divisors (see below), whose sum is σ = 294669883678144. Its totient is φ = 147334687788960.

The previous prime is 221002222221013. The next prime is 221002222221059. The reversal of 221002222221021 is 120122222200122.

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

It is not a de Polignac number, because 221002222221021 - 2³ = 221002222221013 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 (221002222221721) 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 7 ways as a sum of consecutive naturals, for example, 27619681 + ... + 34710966.

It is an arithmetic number, because the mean of its divisors is an integer number (36833735459768).

Almost surely, 2^{221002222221021} is an apocalyptic number.

It is an amenable number.

221002222221021 is a deficient number, since it is larger than the sum of its proper divisors (73667661457123).

221002222221021 is a wasteful number, since it uses less digits than its factorization.

221002222221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63512531.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221002222221021 its reverse (120122222200122), we get a palindrome (341124444421143).

The spelling of 221002222221021 in words is "two hundred twenty-one trillion, two billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".