1123211011231 has 4 divisors (see below), whose sum is σ = 1123217763952. Its totient is φ = 1123204258512.

The previous prime is 1123211011207. The next prime is 1123211011243. The reversal of 1123211011231 is 1321101123211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123211011231 - 2¹⁷ = 1123210880159 is a prime.

It is a super-2 number, since 2×1123211011231² (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 = 1123211011199 and 1123211011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123211011831) 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, 3120390 + ... + 3461683.

It is an arithmetic number, because the mean of its divisors is an integer number (280804440988).

Almost surely, 2^{1123211011231} is an apocalyptic number.

1123211011231 is a deficient number, since it is larger than the sum of its proper divisors (6752721).

1123211011231 is an equidigital number, since it uses as much as digits as its factorization.

1123211011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752720.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1123211011231 its reverse (1321101123211), we get a palindrome (2444312134442).

The spelling of 1123211011231 in words is "one trillion, one hundred twenty-three billion, two hundred eleven million, eleven thousand, two hundred thirty-one".