1131222123 has 6 divisors (see below), whose sum is σ = 1633987524. Its totient is φ = 754148076.

The previous prime is 1131222101. The next prime is 1131222151. The reversal of 1131222123 is 3212221311.

It is not a de Polignac number, because 1131222123 - 2¹⁷ = 1131091051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131222096 and 1131222105.

It is not an unprimeable number, because it can be changed into a prime (1131222173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62845665 + ... + 62845682.

It is an arithmetic number, because the mean of its divisors is an integer number (272331254).

Almost surely, 2^1131222123 is an apocalyptic number.

1131222123 is a deficient number, since it is larger than the sum of its proper divisors (502765401).

1131222123 is a wasteful number, since it uses less digits than its factorization.

1131222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125691353 (or 125691350 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1131222123 is about 33633.6456989129. The cubic root of 1131222123 is about 1041.9558003683.

Adding to 1131222123 its reverse (3212221311), we get a palindrome (4343443434).

The spelling of 1131222123 in words is "one billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred twenty-three".