2031012121 has 4 divisors (see below), whose sum is σ = 2080549044. Its totient is φ = 1981475200.

The previous prime is 2031012097. The next prime is 2031012133. The reversal of 2031012121 is 1212101302.

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 84437721 + 1946574400 = 9189^2 + 44120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031012121 - 2²¹ = 2028914969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031012521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24768400 + ... + 24768481.

It is an arithmetic number, because the mean of its divisors is an integer number (520137261).

Almost surely, 2^2031012121 is an apocalyptic number.

It is an amenable number.

2031012121 is a deficient number, since it is larger than the sum of its proper divisors (49536923).

2031012121 is an equidigital number, since it uses as much as digits as its factorization.

2031012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49536922.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2031012121 is about 45066.7518354718. The cubic root of 2031012121 is about 1266.3998150307.

Adding to 2031012121 its reverse (1212101302), we get a palindrome (3243113423).

The spelling of 2031012121 in words is "two billion, thirty-one million, twelve thousand, one hundred twenty-one".