221320011111001 has 16 divisors (see below), whose sum is σ = 250358797224000. Its totient is φ = 193800648484800.

The previous prime is 221320011110969. The next prime is 221320011111013. The reversal of 221320011111001 is 100111110023122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221320011111001 - 2⁵ = 221320011110969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221320011111041) 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, 823848051 + ... + 824116648.

It is an arithmetic number, because the mean of its divisors is an integer number (15647424826500).

Almost surely, 2^{221320011111001} is an apocalyptic number.

It is an amenable number.

221320011111001 is a deficient number, since it is larger than the sum of its proper divisors (29038786112999).

221320011111001 is a wasteful number, since it uses less digits than its factorization.

221320011111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647965160.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 221320011111001 its reverse (100111110023122), we get a palindrome (321431121134123).

The spelling of 221320011111001 in words is "two hundred twenty-one trillion, three hundred twenty billion, eleven million, one hundred eleven thousand, one".