1123321407 has 16 divisors (see below), whose sum is σ = 1613592960. Its totient is φ = 691009632.

The previous prime is 1123321391. The next prime is 1123321429. The reversal of 1123321407 is 7041233211.

It is a happy number.

It is not a de Polignac number, because 1123321407 - 2⁴ = 1123321391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123321447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161128 + ... + 167954.

It is an arithmetic number, because the mean of its divisors is an integer number (100849560).

Almost surely, 2^1123321407 is an apocalyptic number.

1123321407 is a deficient number, since it is larger than the sum of its proper divisors (490271553).

1123321407 is a wasteful number, since it uses less digits than its factorization.

1123321407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11062.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1123321407 is about 33515.9873344051. The cubic root of 1123321407 is about 1039.5243778699.

Adding to 1123321407 its reverse (7041233211), we get a palindrome (8164554618).

It can be divided in two parts, 11233 and 21407, that added together give a triangular number (32640 = T₂₅₅).

The spelling of 1123321407 in words is "one billion, one hundred twenty-three million, three hundred twenty-one thousand, four hundred seven".