221221101233001 has 16 divisors (see below), whose sum is σ = 302934536452800. Its totient is φ = 143494229994048.

The previous prime is 221221101232889. The next prime is 221221101233029. The reversal of 221221101233001 is 100332101122122.

221221101233001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-221221101233001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221221101233401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27122155 + ... + 34322783.

It is an arithmetic number, because the mean of its divisors is an integer number (18933408528300).

Almost surely, 2^{221221101233001} is an apocalyptic number.

It is an amenable number.

221221101233001 is a deficient number, since it is larger than the sum of its proper divisors (81713435219799).

221221101233001 is a wasteful number, since it uses less digits than its factorization.

221221101233001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477448.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221221101233001 its reverse (100332101122122), we get a palindrome (321553202355123).

The spelling of 221221101233001 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred one million, two hundred thirty-three thousand, one".