2121020232031 has 2 divisors, whose sum is σ = 2121020232032. Its totient is φ = 2121020232030.

The previous prime is 2121020232013. The next prime is 2121020232061. The reversal of 2121020232031 is 1302320201212.

Together with previous prime (2121020232013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121020232031 - 2¹¹ = 2121020229983 is a prime.

It is a super-2 number, since 2×2121020232031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121020232061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060510116015 + 1060510116016.

It is an arithmetic number, because the mean of its divisors is an integer number (1060510116016).

Almost surely, 2^{2121020232031} is an apocalyptic number.

2121020232031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121020232031 is an equidigital number, since it uses as much as digits as its factorization.

2121020232031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2121020232031 its reverse (1302320201212), we get a palindrome (3423340433243).

The spelling of 2121020232031 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred thirty-two thousand, thirty-one".