2031121131321 has 16 divisors (see below), whose sum is σ = 2777397486336. Its totient is φ = 1319604935376.

The previous prime is 2031121131317. The next prime is 2031121131367. The reversal of 2031121131321 is 1231311211302.

It is not a de Polignac number, because 2031121131321 - 2² = 2031121131317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2031121131301) 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, 17713875 + ... + 17828168.

It is an arithmetic number, because the mean of its divisors is an integer number (173587342896).

Almost surely, 2^{2031121131321} is an apocalyptic number.

It is an amenable number.

2031121131321 is a deficient number, since it is larger than the sum of its proper divisors (746276355015).

2031121131321 is a wasteful number, since it uses less digits than its factorization.

2031121131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35542532.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 2031121131321 its reverse (1231311211302), we get a palindrome (3262432342623).

The spelling of 2031121131321 in words is "two trillion, thirty-one billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-one".