2121012012071 has 2 divisors, whose sum is σ = 2121012012072. Its totient is φ = 2121012012070.

The previous prime is 2121012012019. The next prime is 2121012012127. The reversal of 2121012012071 is 1702102101212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121012012071 - 2³⁴ = 2103832142887 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 (2121012012011) 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, 1060506006035 + 1060506006036.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506006036).

Almost surely, 2^{2121012012071} is an apocalyptic number.

2121012012071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012012071 is an equidigital number, since it uses as much as digits as its factorization.

2121012012071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 2121012012071 its reverse (1702102101212), we get a palindrome (3823114113283).

The spelling of 2121012012071 in words is "two trillion, one hundred twenty-one billion, twelve million, twelve thousand, seventy-one".