221001101012210 has 48 divisors (see below), whose sum is σ = 423695930243544. Its totient is φ = 82961528871936.

The previous prime is 221001101012203. The next prime is 221001101012221. The reversal of 221001101012210 is 12210101100122.

It can be written as a sum of positive squares in 4 ways, for example, as 133964721421969 + 87036379590241 = 11574313^2 + 9329329^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393843647 + ... + 394404386.

Almost surely, 2^{221001101012210} is an apocalyptic number.

221001101012210 is a deficient number, since it is larger than the sum of its proper divisors (202694829231334).

221001101012210 is a wasteful number, since it uses less digits than its factorization.

221001101012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788248139 (or 788248116 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221001101012210 its reverse (12210101100122), we get a palindrome (233211202112332).

The spelling of 221001101012210 in words is "two hundred twenty-one trillion, one billion, one hundred one million, twelve thousand, two hundred ten".