221222041021 has 8 divisors (see below), whose sum is σ = 224981285760. Its totient is φ = 217463120352.

The previous prime is 221222040973. The next prime is 221222041037. The reversal of 221222041021 is 120140222122.

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 221222041021 - 2¹⁷ = 221221909949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221222041021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222041081) 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, 1584001 + ... + 1717993.

It is an arithmetic number, because the mean of its divisors is an integer number (28122660720).

Almost surely, 2^221222041021 is an apocalyptic number.

It is an amenable number.

221222041021 is a deficient number, since it is larger than the sum of its proper divisors (3759244739).

221222041021 is a wasteful number, since it uses less digits than its factorization.

221222041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162035.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221222041021 its reverse (120140222122), we get a palindrome (341362263143).

The spelling of 221222041021 in words is "two hundred twenty-one billion, two hundred twenty-two million, forty-one thousand, twenty-one".