1123212232231 has 4 divisors (see below), whose sum is σ = 1144404915912. Its totient is φ = 1102019548552.

The previous prime is 1123212232213. The next prime is 1123212232249. The reversal of 1123212232231 is 1322322123211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1123212232213) and next prime (1123212232249).

It is a cyclic number.

It is not a de Polignac number, because 1123212232231 - 2¹¹ = 1123212230183 is a prime.

It is a super-2 number, since 2×1123212232231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123212232196 and 1123212232205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123212232631) 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, 10596341761 + ... + 10596341866.

It is an arithmetic number, because the mean of its divisors is an integer number (286101228978).

Almost surely, 2^{1123212232231} is an apocalyptic number.

1123212232231 is a deficient number, since it is larger than the sum of its proper divisors (21192683681).

1123212232231 is an equidigital number, since it uses as much as digits as its factorization.

1123212232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21192683680.

The product of its digits is 1728, while the sum is 25.

Adding to 1123212232231 its reverse (1322322123211), we get a palindrome (2445534355442).

The spelling of 1123212232231 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, two hundred thirty-two thousand, two hundred thirty-one".