2120324400403 has 16 divisors (see below), whose sum is σ = 2330088566400. Its totient is φ = 1913399167680.

The previous prime is 2120324400391. The next prime is 2120324400409. The reversal of 2120324400403 is 3040044230212.

It is a happy number.

It is not a de Polignac number, because 2120324400403 - 2¹³ = 2120324392211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120324400409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9913728 + ... + 10125346.

It is an arithmetic number, because the mean of its divisors is an integer number (145630535400).

Almost surely, 2^{2120324400403} is an apocalyptic number.

2120324400403 is a deficient number, since it is larger than the sum of its proper divisors (209764165997).

2120324400403 is a wasteful number, since it uses less digits than its factorization.

2120324400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218322.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 2120324400403 its reverse (3040044230212), we get a palindrome (5160368630615).

The spelling of 2120324400403 in words is "two trillion, one hundred twenty billion, three hundred twenty-four million, four hundred thousand, four hundred three".