221202201021 has 8 divisors (see below), whose sum is σ = 298250159040. Its totient is φ = 145811188512.

The previous prime is 221202201007. The next prime is 221202201083. The reversal of 221202201021 is 120102202122.

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

It is not a de Polignac number, because 221202201021 - 2⁹ = 221202200509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202201221) 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, 414236065 + ... + 414236598.

It is an arithmetic number, because the mean of its divisors is an integer number (37281269880).

Almost surely, 2^221202201021 is an apocalyptic number.

It is an amenable number.

221202201021 is a deficient number, since it is larger than the sum of its proper divisors (77047958019).

221202201021 is an equidigital number, since it uses as much as digits as its factorization.

221202201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828472755.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221202201021 its reverse (120102202122), we get a palindrome (341304403143).

The spelling of 221202201021 in words is "two hundred twenty-one billion, two hundred two million, two hundred one thousand, twenty-one".