1121321111 has 2 divisors, whose sum is σ = 1121321112. Its totient is φ = 1121321110.

The previous prime is 1121321101. The next prime is 1121321143. The reversal of 1121321111 is 1111231211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121321111 is a prime.

It is a super-2 number, since 2×1121321111² = 2514722067948548642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121321101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560660555 + 560660556.

It is an arithmetic number, because the mean of its divisors is an integer number (560660556).

Almost surely, 2^1121321111 is an apocalyptic number.

1121321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121321111 is an equidigital number, since it uses as much as digits as its factorization.

1121321111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12, while the sum is 14.

The square root of 1121321111 is about 33486.1331150672. The cubic root of 1121321111 is about 1038.9069849909.

Adding to 1121321111 its reverse (1111231211), we get a palindrome (2232552322).

The spelling of 1121321111 in words is "one billion, one hundred twenty-one million, three hundred twenty-one thousand, one hundred eleven".