221111012211001 has 12 divisors (see below), whose sum is σ = 243205956674800. Its totient is φ = 200872238486040.

The previous prime is 221111012210993. The next prime is 221111012211049. The reversal of 221111012211001 is 100112210111122.

It is not a de Polignac number, because 221111012211001 - 2³ = 221111012210993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221111012241001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626061891 + ... + 626414968.

Almost surely, 2^{221111012211001} is an apocalyptic number.

It is an amenable number.

221111012211001 is a deficient number, since it is larger than the sum of its proper divisors (22094944463799).

221111012211001 is a wasteful number, since it uses less digits than its factorization.

221111012211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252478340 (or 1252478329 counting only the distinct ones).

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

Adding to 221111012211001 its reverse (100112210111122), we get a palindrome (321223222322123).

The spelling of 221111012211001 in words is "two hundred twenty-one trillion, one hundred eleven billion, twelve million, two hundred eleven thousand, one".