2121221211983 has 2 divisors, whose sum is σ = 2121221211984. Its totient is φ = 2121221211982.

The previous prime is 2121221211959. The next prime is 2121221212009. The reversal of 2121221211983 is 3891121221212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121221211983 - 2⁶ = 2121221211919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121221211583) 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, 1060610605991 + 1060610605992.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610605992).

Almost surely, 2^{2121221211983} is an apocalyptic number.

2121221211983 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121221211983 is an equidigital number, since it uses as much as digits as its factorization.

2121221211983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The spelling of 2121221211983 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, nine hundred eighty-three".