1321111 has 8 divisors (see below), whose sum is σ = 1459584. Its totient is φ = 1185720.

The previous prime is 1321109. The next prime is 1321139. The reversal of 1321111 is 1111231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321111 - 2¹ = 1321109 is a prime.

It is a Duffinian number.

1321111 is a modest number, since divided by 1111 gives 132 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (182448).

2^1321111 is an apocalyptic number.

1321111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321111 is a deficient number, since it is larger than the sum of its proper divisors (138473).

1321111 is a wasteful number, since it uses less digits than its factorization.

1321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

The product of its digits is 6, while the sum is 10.

The square root of 1321111 is about 1149.3959283032. The cubic root of 1321111 is about 109.7268982773.

Adding to 1321111 its reverse (1111231), we get a palindrome (2432342).

The spelling of 1321111 in words is "one million, three hundred twenty-one thousand, one hundred eleven".