2100121271 has 2 divisors, whose sum is σ = 2100121272. Its totient is φ = 2100121270.

The previous prime is 2100121253. The next prime is 2100121277. The reversal of 2100121271 is 1721210012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100121271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100121277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050060635 + 1050060636.

It is an arithmetic number, because the mean of its divisors is an integer number (1050060636).

Almost surely, 2^2100121271 is an apocalyptic number.

2100121271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100121271 is an equidigital number, since it uses as much as digits as its factorization.

2100121271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 2100121271 is about 45827.0801055446. The cubic root of 2100121271 is about 1280.6038148489.

Adding to 2100121271 its reverse (1721210012), we get a palindrome (3821331283).

The spelling of 2100121271 in words is "two billion, one hundred million, one hundred twenty-one thousand, two hundred seventy-one".