2123031331121 has 8 divisors (see below), whose sum is σ = 2130848085288. Its totient is φ = 2115216432000.

The previous prime is 2123031331087. The next prime is 2123031331151. The reversal of 2123031331121 is 1211331303212.

It can be written as a sum of positive squares in 4 ways, for example, as 1184264121121 + 938767210000 = 1088239^2 + 968900^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123031331121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123031331151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850591 + ... + 2769611.

It is an arithmetic number, because the mean of its divisors is an integer number (266356010661).

Almost surely, 2^{2123031331121} is an apocalyptic number.

It is an amenable number.

2123031331121 is a deficient number, since it is larger than the sum of its proper divisors (7816754167).

2123031331121 is an equidigital number, since it uses as much as digits as its factorization.

2123031331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927523.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2123031331121 its reverse (1211331303212), we get a palindrome (3334362634333).

The spelling of 2123031331121 in words is "two trillion, one hundred twenty-three billion, thirty-one million, three hundred thirty-one thousand, one hundred twenty-one".