2031210310121 has 4 divisors (see below), whose sum is σ = 2080752025044. Its totient is φ = 1981668595200.

The previous prime is 2031210310117. The next prime is 2031210310159. The reversal of 2031210310121 is 1210130121302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 518703884521 + 1512506425600 = 720211^2 + 1229840^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031210310121 - 2² = 2031210310117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031210310121.

It is not an unprimeable number, because it can be changed into a prime (2031210310111) 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 3 ways as a sum of consecutive naturals, for example, 24770857400 + ... + 24770857481.

It is an arithmetic number, because the mean of its divisors is an integer number (520188006261).

Almost surely, 2^{2031210310121} is an apocalyptic number.

It is an amenable number.

2031210310121 is a deficient number, since it is larger than the sum of its proper divisors (49541714923).

2031210310121 is an equidigital number, since it uses as much as digits as its factorization.

2031210310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49541714922.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2031210310121 its reverse (1210130121302), we get a palindrome (3241340431423).

The spelling of 2031210310121 in words is "two trillion, thirty-one billion, two hundred ten million, three hundred ten thousand, one hundred twenty-one".