1121432403 has 16 divisors (see below), whose sum is σ = 1840299776. Its totient is φ = 591524640.

The previous prime is 1121432281. The next prime is 1121432441. The reversal of 1121432403 is 3042341211.

It is not a de Polignac number, because 1121432403 - 2¹³ = 1121424211 is a prime.

It is a super-2 number, since 2×1121432403² = 2515221268996708818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1121432403.

It is not an unprimeable number, because it can be changed into a prime (1121432203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2053633 + ... + 2054178.

It is an arithmetic number, because the mean of its divisors is an integer number (115018736).

Almost surely, 2^1121432403 is an apocalyptic number.

1121432403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1121432403 is a deficient number, since it is larger than the sum of its proper divisors (718867373).

1121432403 is a wasteful number, since it uses less digits than its factorization.

1121432403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107834.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1121432403 is about 33487.7948363281. The cubic root of 1121432403 is about 1038.9413546317.

Adding to 1121432403 its reverse (3042341211), we get a palindrome (4163773614).

The spelling of 1121432403 in words is "one billion, one hundred twenty-one million, four hundred thirty-two thousand, four hundred three".