1121263388 has 12 divisors (see below), whose sum is σ = 2242526832. Its totient is φ = 480541440.

The previous prime is 1121263357. The next prime is 1121263391. The reversal of 1121263388 is 8833621211.

It is a happy number.

1121263388 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20022533 + ... + 20022588.

It is an arithmetic number, because the mean of its divisors is an integer number (186877236).

Almost surely, 2^1121263388 is an apocalyptic number.

It is an amenable number.

1121263388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1121263388 is a wasteful number, since it uses less digits than its factorization.

1121263388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40045132 (or 40045130 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 1121263388 is about 33485.2712098917. The cubic root of 1121263388 is about 1038.8891578475.

Adding to 1121263388 its reverse (8833621211), we get a palindrome (9954884599).

The spelling of 1121263388 in words is "one billion, one hundred twenty-one million, two hundred sixty-three thousand, three hundred eighty-eight".