1123212331 has 8 divisors (see below), whose sum is σ = 1149784064. Its totient is φ = 1096661160.

The previous prime is 1123212319. The next prime is 1123212397. The reversal of 1123212331 is 1332123211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123212331 - 2²¹ = 1121115179 is a prime.

It is a super-2 number, since 2×1123212331² = 2523211881020907122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123212299 and 1123212308.

It is not an unprimeable number, because it can be changed into a prime (1123212031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205030 + ... + 210436.

It is an arithmetic number, because the mean of its divisors is an integer number (143723008).

Almost surely, 2^1123212331 is an apocalyptic number.

1123212331 is a deficient number, since it is larger than the sum of its proper divisors (26571733).

1123212331 is an equidigital number, since it uses as much as digits as its factorization.

1123212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10281.

The product of its digits is 216, while the sum is 19.

The square root of 1123212331 is about 33514.3600714679. The cubic root of 1123212331 is about 1039.4907303818.

Adding to 1123212331 its reverse (1332123211), we get a palindrome (2455335542).

The spelling of 1123212331 in words is "one billion, one hundred twenty-three million, two hundred twelve thousand, three hundred thirty-one".