1132123121 has 4 divisors (see below), whose sum is σ = 1132393200. Its totient is φ = 1131853044.

The previous prime is 1132123103. The next prime is 1132123129. The reversal of 1132123121 is 1213212311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1132123121 is a prime.

It is a super-2 number, since 2×1132123121² = 2563405522205561282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1132123121.

It is not an unprimeable number, because it can be changed into a prime (1132123129) 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, 128651 + ... + 137168.

It is an arithmetic number, because the mean of its divisors is an integer number (283098300).

Almost surely, 2^1132123121 is an apocalyptic number.

It is an amenable number.

1132123121 is a deficient number, since it is larger than the sum of its proper divisors (270079).

1132123121 is an equidigital number, since it uses as much as digits as its factorization.

1132123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270078.

The product of its digits is 72, while the sum is 17.

The square root of 1132123121 is about 33647.0373287159. The cubic root of 1132123121 is about 1042.2323599515.

Adding to 1132123121 its reverse (1213212311), we get a palindrome (2345335432).

The spelling of 1132123121 in words is "one billion, one hundred thirty-two million, one hundred twenty-three thousand, one hundred twenty-one".