2131221023323 has 32 divisors (see below), whose sum is σ = 2472609742848. Its totient is φ = 1799271348000.

The previous prime is 2131221023311. The next prime is 2131221023389. The reversal of 2131221023323 is 3233201221312.

It is not a de Polignac number, because 2131221023323 - 2⁵ = 2131221023291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131221023123) 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, 478816248 + ... + 478820698.

It is an arithmetic number, because the mean of its divisors is an integer number (77269054464).

Almost surely, 2^{2131221023323} is an apocalyptic number.

2131221023323 is a deficient number, since it is larger than the sum of its proper divisors (341388719525).

2131221023323 is a wasteful number, since it uses less digits than its factorization.

2131221023323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2131221023323 its reverse (3233201221312), we get a palindrome (5364422244635).

The spelling of 2131221023323 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-one million, twenty-three thousand, three hundred twenty-three".