1112121 has 12 divisors (see below), whose sum is σ = 1662180. Its totient is φ = 715680.

The previous prime is 1112113. The next prime is 1112129. The reversal of 1112121 is 1212111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1112113) and next prime (1112129).

It can be written as a sum of positive squares in 2 ways, for example, as 881721 + 230400 = 939^2 + 480^2 .

It is not a de Polignac number, because 1112121 - 2³ = 1112113 is a prime.

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

1112121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1112129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1870 + ... + 2391.

It is an arithmetic number, because the mean of its divisors is an integer number (138515).

2^1112121 is an apocalyptic number.

It is an amenable number.

1112121 is a deficient number, since it is larger than the sum of its proper divisors (550059).

1112121 is a wasteful number, since it uses less digits than its factorization.

1112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296 (or 4293 counting only the distinct ones).

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

The square root of 1112121 is about 1054.5714769517. The cubic root of 1112121 is about 103.6057869588.

Adding to 1112121 its reverse (1212111), we get a palindrome (2324232).

It can be divided in two parts, 11 and 12121, that multiplied together give a palindrome (133331).

The spelling of 1112121 in words is "one million, one hundred twelve thousand, one hundred twenty-one".