111100012221 has 64 divisors (see below), whose sum is σ = 168669628416. Its totient is φ = 64455264000.

The previous prime is 111100012217. The next prime is 111100012223. The reversal of 111100012221 is 122210001111.

It is not a de Polignac number, because 111100012221 - 2² = 111100012217 is a prime.

111100012221 is a modest number, since divided by 12221 gives 1111 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 111100012197 and 111100012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100012223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20098560 + ... + 20104086.

It is an arithmetic number, because the mean of its divisors is an integer number (2635462944).

Almost surely, 2^111100012221 is an apocalyptic number.

111100012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111100012221 is a deficient number, since it is larger than the sum of its proper divisors (57569616195).

111100012221 is a wasteful number, since it uses less digits than its factorization.

111100012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111100012221 its reverse (122210001111), we get a palindrome (233310013332).

The spelling of 111100012221 in words is "one hundred eleven billion, one hundred million, twelve thousand, two hundred twenty-one".