2121101071 has 2 divisors, whose sum is σ = 2121101072. Its totient is φ = 2121101070.

The previous prime is 2121101069. The next prime is 2121101083. The reversal of 2121101071 is 1701011212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121101071 - 2¹ = 2121101069 is a prime.

Together with 2121101069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121101371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060550535 + 1060550536.

It is an arithmetic number, because the mean of its divisors is an integer number (1060550536).

Almost surely, 2^2121101071 is an apocalyptic number.

2121101071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121101071 is an equidigital number, since it uses as much as digits as its factorization.

2121101071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 2121101071 is about 46055.4130477624. The cubic root of 2121101071 is about 1284.8540202683.

Adding to 2121101071 its reverse (1701011212), we get a palindrome (3822112283).

The spelling of 2121101071 in words is "two billion, one hundred twenty-one million, one hundred one thousand, seventy-one".