2121220121071 has 2 divisors, whose sum is σ = 2121220121072. Its totient is φ = 2121220121070.

The previous prime is 2121220121051. The next prime is 2121220121159. The reversal of 2121220121071 is 1701210221212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121220121071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121220121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060610060535 + 1060610060536.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610060536).

Almost surely, 2^{2121220121071} is an apocalyptic number.

2121220121071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121220121071 is an equidigital number, since it uses as much as digits as its factorization.

2121220121071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 2121220121071 its reverse (1701210221212), we get a palindrome (3822430342283).

The spelling of 2121220121071 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, seventy-one".