221221021202 has 8 divisors (see below), whose sum is σ = 331845150000. Its totient is φ = 110605971204.

The previous prime is 221221021157. The next prime is 221221021237. The reversal of 221221021202 is 202120122122.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208452 + ... + 2306447.

It is an arithmetic number, because the mean of its divisors is an integer number (41480643750).

Almost surely, 2^221221021202 is an apocalyptic number.

221221021202 is a deficient number, since it is larger than the sum of its proper divisors (110624128798).

221221021202 is a wasteful number, since it uses less digits than its factorization.

221221021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539400.

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

Adding to 221221021202 its reverse (202120122122), we get a palindrome (423341143324).

The spelling of 221221021202 in words is "two hundred twenty-one billion, two hundred twenty-one million, twenty-one thousand, two hundred two".