221221020201 has 8 divisors (see below), whose sum is σ = 294964778304. Its totient is φ = 147478971120.

The previous prime is 221221020197. The next prime is 221221020211. The reversal of 221221020201 is 102020122122.

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

It is not a de Polignac number, because 221221020201 - 2² = 221221020197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221221020211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86365 + ... + 670746.

It is an arithmetic number, because the mean of its divisors is an integer number (36870597288).

Almost surely, 2^221221020201 is an apocalyptic number.

It is an amenable number.

221221020201 is a deficient number, since it is larger than the sum of its proper divisors (73743758103).

221221020201 is an equidigital number, since it uses as much as digits as its factorization.

221221020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854511.

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

Adding to 221221020201 its reverse (102020122122), we get a palindrome (323241142323).

It can be divided in two parts, 22122 and 1020201, that multiplied together give a palindrome (22568886522).

The spelling of 221221020201 in words is "two hundred twenty-one billion, two hundred twenty-one million, twenty thousand, two hundred one".