2123504431055 has 32 divisors (see below), whose sum is σ = 2914634351616. Its totient is φ = 1454918091264.

The previous prime is 2123504431021. The next prime is 2123504431057. The reversal of 2123504431055 is 5501344053212.

It is a cyclic number.

It is not a de Polignac number, because 2123504431055 - 2²⁴ = 2123487653839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123504431057) 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, 304791182 + ... + 304798148.

It is an arithmetic number, because the mean of its divisors is an integer number (91082323488).

Almost surely, 2^{2123504431055} is an apocalyptic number.

2123504431055 is a deficient number, since it is larger than the sum of its proper divisors (791129920561).

2123504431055 is a wasteful number, since it uses less digits than its factorization.

2123504431055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12903.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 2123504431055 its reverse (5501344053212), we get a palindrome (7624848484267).

The spelling of 2123504431055 in words is "two trillion, one hundred twenty-three billion, five hundred four million, four hundred thirty-one thousand, fifty-five".