1123212131223 has 32 divisors (see below), whose sum is σ = 1868469528576. Its totient is φ = 584347592448.

The previous prime is 1123212131177. The next prime is 1123212131233. The reversal of 1123212131223 is 3221312123211.

It is not a de Polignac number, because 1123212131223 - 2¹⁸ = 1123211869079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123212131193 and 1123212131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123212131233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28160415 + ... + 28200272.

It is an arithmetic number, because the mean of its divisors is an integer number (58389672768).

Almost surely, 2^{1123212131223} is an apocalyptic number.

1123212131223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1123212131223 is a deficient number, since it is larger than the sum of its proper divisors (745257397353).

1123212131223 is a wasteful number, since it uses less digits than its factorization.

1123212131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56360783.

The product of its digits is 864, while the sum is 24.

Adding to 1123212131223 its reverse (3221312123211), we get a palindrome (4344524254434).

The spelling of 1123212131223 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, one hundred thirty-one thousand, two hundred twenty-three".