111101110221111 has 16 divisors (see below), whose sum is σ = 149044268975616. Its totient is φ = 73612683121536.

The previous prime is 111101110221103. The next prime is 111101110221119. The reversal of 111101110221111 is 111122011101111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111101110221103) and next prime (111101110221119).

It is not a de Polignac number, because 111101110221111 - 2³ = 111101110221103 is a prime.

It is a super-4 number, since 4×111101110221111⁴ (a number of 57 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101110221119) 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, 173193186 + ... + 173833488.

It is an arithmetic number, because the mean of its divisors is an integer number (9315266810976).

Almost surely, 2^{111101110221111} is an apocalyptic number.

111101110221111 is a deficient number, since it is larger than the sum of its proper divisors (37943158754505).

111101110221111 is a wasteful number, since it uses less digits than its factorization.

111101110221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995302.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111101110221111 its reverse (111122011101111), we get a palindrome (222223121322222).

The spelling of 111101110221111 in words is "one hundred eleven trillion, one hundred one billion, one hundred ten million, two hundred twenty-one thousand, one hundred eleven".