20110111100321 has 16 divisors (see below), whose sum is σ = 22468094069568. Its totient is φ = 17845590297600.

The previous prime is 20110111100239. The next prime is 20110111100347. The reversal of 20110111100321 is 12300111101102.

It is a cyclic number.

It is not a de Polignac number, because 20110111100321 - 2²² = 20110106906017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110111100296 and 20110111100305.

It is not an unprimeable number, because it can be changed into a prime (20110111130321) 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, 129013475 + ... + 129169256.

It is an arithmetic number, because the mean of its divisors is an integer number (1404255879348).

Almost surely, 2^{20110111100321} is an apocalyptic number.

It is an amenable number.

20110111100321 is a deficient number, since it is larger than the sum of its proper divisors (2357982969247).

20110111100321 is a wasteful number, since it uses less digits than its factorization.

20110111100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258182912.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 20110111100321 its reverse (12300111101102), we get a palindrome (32410222201423).

The spelling of 20110111100321 in words is "twenty trillion, one hundred ten billion, one hundred eleven million, one hundred thousand, three hundred twenty-one".