221101221012010 has 32 divisors (see below), whose sum is σ = 415381327541712. Its totient is φ = 84655414571520.

The previous prime is 221101221011981. The next prime is 221101221012017. The reversal of 221101221012010 is 10210122101122.

It can be written as a sum of positive squares in 8 ways, for example, as 112772654585809 + 108328566426201 = 10619447^2 + 10408101^2 .

It is not an unprimeable number, because it can be changed into a prime (221101221012017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5087443089 + ... + 5087486548.

Almost surely, 2^{221101221012010} is an apocalyptic number.

221101221012010 is a deficient number, since it is larger than the sum of its proper divisors (194280106529702).

221101221012010 is a wasteful number, since it uses less digits than its factorization.

221101221012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10174929738.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221101221012010 its reverse (10210122101122), we get a palindrome (231311343113132).

It can be divided in two parts, 22110122 and 1012010, that added together give a palindrome (23122132).

The spelling of 221101221012010 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred twenty-one million, twelve thousand, ten".