221332311021 has 8 divisors (see below), whose sum is σ = 301972765600. Its totient is φ = 144123365232.

The previous prime is 221332310933. The next prime is 221332311023. The reversal of 221332311021 is 120113233122.

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

It is not a de Polignac number, because 221332311021 - 2¹⁰ = 221332309997 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 (221332311023) 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, 857877046 + ... + 857877303.

It is an arithmetic number, because the mean of its divisors is an integer number (37746595700).

Almost surely, 2^221332311021 is an apocalyptic number.

It is an amenable number.

221332311021 is a deficient number, since it is larger than the sum of its proper divisors (80640454579).

221332311021 is a wasteful number, since it uses less digits than its factorization.

221332311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715754395.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221332311021 its reverse (120113233122), we get a palindrome (341445544143).

The spelling of 221332311021 in words is "two hundred twenty-one billion, three hundred thirty-two million, three hundred eleven thousand, twenty-one".