2123442155555 has 48 divisors (see below), whose sum is σ = 3066811593120. Its totient is φ = 1405659967488.

The previous prime is 2123442155509. The next prime is 2123442155561. The reversal of 2123442155555 is 5555512443212.

It is not a de Polignac number, because 2123442155555 - 2⁶ = 2123442155491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60467312 + ... + 60502418.

It is an arithmetic number, because the mean of its divisors is an integer number (63891908190).

Almost surely, 2^{2123442155555} is an apocalyptic number.

2123442155555 is a deficient number, since it is larger than the sum of its proper divisors (943369437565).

2123442155555 is a wasteful number, since it uses less digits than its factorization.

2123442155555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43668 (or 43661 counting only the distinct ones).

The product of its digits is 1200000, while the sum is 44.

Adding to 2123442155555 its reverse (5555512443212), we get a palindrome (7678954598767).

The spelling of 2123442155555 in words is "two trillion, one hundred twenty-three billion, four hundred forty-two million, one hundred fifty-five thousand, five hundred fifty-five".