1121123311 has 32 divisors (see below), whose sum is σ = 1437166080. Its totient is φ = 849139200.

The previous prime is 1121123287. The next prime is 1121123317. The reversal of 1121123311 is 1133211211.

It is a happy number.

It is not a de Polignac number, because 1121123311 - 2⁵ = 1121123279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121123317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1196035 + ... + 1196971.

It is an arithmetic number, because the mean of its divisors is an integer number (44911440).

Almost surely, 2^1121123311 is an apocalyptic number.

1121123311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121123311 is a deficient number, since it is larger than the sum of its proper divisors (316042769).

1121123311 is a wasteful number, since it uses less digits than its factorization.

1121123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375.

The product of its digits is 36, while the sum is 16.

The square root of 1121123311 is about 33483.1795234563. The cubic root of 1121123311 is about 1038.8458939904.

Adding to 1121123311 its reverse (1133211211), we get a palindrome (2254334522).

The spelling of 1121123311 in words is "one billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred eleven".