2121111983 has 2 divisors, whose sum is σ = 2121111984. Its totient is φ = 2121111982.

The previous prime is 2121111973. The next prime is 2121111989. The reversal of 2121111983 is 3891111212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121111983 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121111989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060555991 + 1060555992.

It is an arithmetic number, because the mean of its divisors is an integer number (1060555992).

Almost surely, 2^2121111983 is an apocalyptic number.

2121111983 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121111983 is an equidigital number, since it uses as much as digits as its factorization.

2121111983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 29.

The square root of 2121111983 is about 46055.5315135978. The cubic root of 2121111983 is about 1284.8562235742.

The spelling of 2121111983 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred eighty-three".