1123213234645 has 16 divisors (see below), whose sum is σ = 1380256954560. Its totient is φ = 877001860224.

The previous prime is 1123213234643. The next prime is 1123213234681. The reversal of 1123213234645 is 5464323123211.

It is a cyclic number.

It is not a de Polignac number, because 1123213234645 - 2¹ = 1123213234643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123213234643) 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 15 ways as a sum of consecutive naturals, for example, 1717560 + ... + 2279569.

It is an arithmetic number, because the mean of its divisors is an integer number (86266059660).

Almost surely, 2^{1123213234645} is an apocalyptic number.

It is an amenable number.

1123213234645 is a deficient number, since it is larger than the sum of its proper divisors (257043719915).

1123213234645 is a wasteful number, since it uses less digits than its factorization.

1123213234645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998484.

The product of its digits is 103680, while the sum is 37.

Adding to 1123213234645 its reverse (5464323123211), we get a palindrome (6587536357856).

The spelling of 1123213234645 in words is "one trillion, one hundred twenty-three billion, two hundred thirteen million, two hundred thirty-four thousand, six hundred forty-five".