221000100221201 has 32 divisors (see below), whose sum is σ = 254695729397760. Its totient is φ = 187838645904000.

The previous prime is 221000100221183. The next prime is 221000100221261. The reversal of 221000100221201 is 102122001000122.

It is a de Polignac number, because none of the positive numbers 2^k-221000100221201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221000100221261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5253005996 + ... + 5253048066.

It is an arithmetic number, because the mean of its divisors is an integer number (7959241543680).

Almost surely, 2^{221000100221201} is an apocalyptic number.

It is an amenable number.

221000100221201 is a deficient number, since it is larger than the sum of its proper divisors (33695629176559).

221000100221201 is a wasteful number, since it uses less digits than its factorization.

221000100221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48125.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221000100221201 its reverse (102122001000122), we get a palindrome (323122101221323).

The spelling of 221000100221201 in words is "two hundred twenty-one trillion, one hundred million, two hundred twenty-one thousand, two hundred one".