2011100222321 has 4 divisors (see below), whose sum is σ = 2011572205044. Its totient is φ = 2010628239600.

The previous prime is 2011100222317. The next prime is 2011100222347. The reversal of 2011100222321 is 1232220011102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1243584055921 + 767516166400 = 1115161^2 + 876080^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011100222321 - 2² = 2011100222317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011100222321.

It is not an unprimeable number, because it can be changed into a prime (2011100222311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235984970 + ... + 235993491.

It is an arithmetic number, because the mean of its divisors is an integer number (502893051261).

Almost surely, 2^{2011100222321} is an apocalyptic number.

It is an amenable number.

2011100222321 is a deficient number, since it is larger than the sum of its proper divisors (471982723).

2011100222321 is an equidigital number, since it uses as much as digits as its factorization.

2011100222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471982722.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2011100222321 its reverse (1232220011102), we get a palindrome (3243320233423).

The spelling of 2011100222321 in words is "two trillion, eleven billion, one hundred million, two hundred twenty-two thousand, three hundred twenty-one".