123044220111553 has 16 divisors (see below), whose sum is σ = 132648042710736. Its totient is φ = 113460243609600.

The previous prime is 123044220111541. The next prime is 123044220111613. The reversal of 123044220111553 is 355111022440321.

It can be written as a sum of positive squares in 8 ways, for example, as 4492801662129 + 118551418449424 = 2119623^2 + 10888132^2 .

It is a cyclic number.

It is not a de Polignac number, because 123044220111553 - 2⁹ = 123044220111041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123044220112553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663572653 + ... + 663758053.

It is an arithmetic number, because the mean of its divisors is an integer number (8290502669421).

Almost surely, 2^{123044220111553} is an apocalyptic number.

123044220111553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123044220111553 is a deficient number, since it is larger than the sum of its proper divisors (9603822599183).

123044220111553 is a wasteful number, since it uses less digits than its factorization.

123044220111553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238644.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 123044220111553 its reverse (355111022440321), we get a palindrome (478155242551874).

The spelling of 123044220111553 in words is "one hundred twenty-three trillion, forty-four billion, two hundred twenty million, one hundred eleven thousand, five hundred fifty-three".