22001001221001 has 16 divisors (see below), whose sum is σ = 32003872344000. Its totient is φ = 13332933457920.

The previous prime is 22001001220999. The next prime is 22001001221009. The reversal of 22001001221001 is 10012210010022.

It is not a de Polignac number, because 22001001221001 - 2¹ = 22001001220999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22001001221009) 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, 24723060 + ... + 25597493.

It is an arithmetic number, because the mean of its divisors is an integer number (2000242021500).

Almost surely, 2^{22001001221001} is an apocalyptic number.

It is an amenable number.

22001001221001 is a deficient number, since it is larger than the sum of its proper divisors (10002871122999).

22001001221001 is a wasteful number, since it uses less digits than its factorization.

22001001221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50333816.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22001001221001 its reverse (10012210010022), we get a palindrome (32013211231023).

The spelling of 22001001221001 in words is "twenty-two trillion, one billion, one million, two hundred twenty-one thousand, one".