1121123240 has 16 divisors (see below), whose sum is σ = 2522527380. Its totient is φ = 448449280.

The previous prime is 1121123203. The next prime is 1121123243. The reversal of 1121123240 is 423211211.

It can be written as a sum of positive squares in 2 ways, for example, as 1103967076 + 17156164 = 33226^2 + 4142^2 .

It is not an unprimeable number, because it can be changed into a prime (1121123243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14014001 + ... + 14014080.

Almost surely, 2^1121123240 is an apocalyptic number.

1121123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121123240 is an abundant number, since it is smaller than the sum of its proper divisors (1401404140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121123240 is a wasteful number, since it uses less digits than its factorization.

1121123240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28028092 (or 28028088 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1121123240 is about 33483.1784632224. The cubic root of 1121123240 is about 1038.8458720605.

Adding to 1121123240 its reverse (423211211), we get a palindrome (1544334451).

The spelling of 1121123240 in words is "one billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred forty".