202221021221 has 8 divisors (see below), whose sum is σ = 206961237120. Its totient is φ = 197482505472.

The previous prime is 202221021203. The next prime is 202221021239. The reversal of 202221021221 is 122120122202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (202221021203) and next prime (202221021239).

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 202221021221 - 2³⁰ = 201147279397 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 202221021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221021721) 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, 182765 + ... + 661698.

It is an arithmetic number, because the mean of its divisors is an integer number (25870154640).

Almost surely, 2^202221021221 is an apocalyptic number.

It is an amenable number.

202221021221 is a deficient number, since it is larger than the sum of its proper divisors (4740215899).

202221021221 is an equidigital number, since it uses as much as digits as its factorization.

202221021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850075.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202221021221 its reverse (122120122202), we get a palindrome (324341143423).

The spelling of 202221021221 in words is "two hundred two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".