2121012031 has 2 divisors, whose sum is σ = 2121012032. Its totient is φ = 2121012030.

The previous prime is 2121011927. The next prime is 2121012043. The reversal of 2121012031 is 1302101212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121012031 - 2⁷ = 2121011903 is a prime.

It is a super-2 number, since 2×2121012031² = 8997384071293489922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121012071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060506015 + 1060506016.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506016).

Almost surely, 2^2121012031 is an apocalyptic number.

2121012031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012031 is an equidigital number, since it uses as much as digits as its factorization.

2121012031 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2121012031 is about 46054.4463760015. The cubic root of 2121012031 is about 1284.8360413981.

Adding to 2121012031 its reverse (1302101212), we get a palindrome (3423113243).

The spelling of 2121012031 in words is "two billion, one hundred twenty-one million, twelve thousand, thirty-one".