1123021321231 has 4 divisors (see below), whose sum is σ = 1123049268864. Its totient is φ = 1122993373600.

The previous prime is 1123021321229. The next prime is 1123021321271. The reversal of 1123021321231 is 1321231203211.

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 1123021321231 - 2¹ = 1123021321229 is a prime.

It is a super-2 number, since 2×1123021321231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123021321271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13913455 + ... + 13993936.

It is an arithmetic number, because the mean of its divisors is an integer number (280762317216).

Almost surely, 2^{1123021321231} is an apocalyptic number.

1123021321231 is a deficient number, since it is larger than the sum of its proper divisors (27947633).

1123021321231 is an equidigital number, since it uses as much as digits as its factorization.

1123021321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27947632.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1123021321231 its reverse (1321231203211), we get a palindrome (2444252524442).

The spelling of 1123021321231 in words is "one trillion, one hundred twenty-three billion, twenty-one million, three hundred twenty-one thousand, two hundred thirty-one".