2121212001031 has 2 divisors, whose sum is σ = 2121212001032. Its totient is φ = 2121212001030.

The previous prime is 2121212001001. The next prime is 2121212001047. The reversal of 2121212001031 is 1301002121212.

It is an a-pointer prime, because the next prime (2121212001047) can be obtained adding 2121212001031 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121212001031 - 2²⁷ = 2121077783303 is a prime.

It is a super-2 number, since 2×2121212001031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121212000996 and 2121212001014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121212001001) 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 as a sum of consecutive naturals, namely, 1060606000515 + 1060606000516.

It is an arithmetic number, because the mean of its divisors is an integer number (1060606000516).

Almost surely, 2^{2121212001031} is an apocalyptic number.

2121212001031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121212001031 is an equidigital number, since it uses as much as digits as its factorization.

2121212001031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2121212001031 its reverse (1301002121212), we get a palindrome (3422214122243).

The spelling of 2121212001031 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, one thousand, thirty-one".