111022101 has 12 divisors (see below), whose sum is σ = 161327712. Its totient is φ = 73570536.

The previous prime is 111022099. The next prime is 111022103. The reversal of 111022101 is 101220111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111022099) and next prime (111022103).

It is not a de Polignac number, because 111022101 - 2¹ = 111022099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35431 + ... + 38436.

It is an arithmetic number, because the mean of its divisors is an integer number (13443976).

Almost surely, 2^111022101 is an apocalyptic number.

It is an amenable number.

111022101 is a deficient number, since it is larger than the sum of its proper divisors (50305611).

111022101 is a wasteful number, since it uses less digits than its factorization.

111022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74040 (or 74037 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 111022101 is about 10536.7025676917. The cubic root of 111022101 is about 480.6214476794.

Adding to 111022101 its reverse (101220111), we get a palindrome (212242212).

It can be divided in two parts, 11102 and 2101, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 111022101 in words is "one hundred eleven million, twenty-two thousand, one hundred one".