2100112011971 has 2 divisors, whose sum is σ = 2100112011972. Its totient is φ = 2100112011970.

The previous prime is 2100112011941. The next prime is 2100112012043. The reversal of 2100112011971 is 1791102110012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100112011971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100112011971.

It is not a weakly prime, because it can be changed into another prime (2100112011941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050056005985 + 1050056005986.

It is an arithmetic number, because the mean of its divisors is an integer number (1050056005986).

Almost surely, 2^{2100112011971} is an apocalyptic number.

2100112011971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100112011971 is an equidigital number, since it uses as much as digits as its factorization.

2100112011971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 26.

Adding to 2100112011971 its reverse (1791102110012), we get a palindrome (3891214121983).

The spelling of 2100112011971 in words is "two trillion, one hundred billion, one hundred twelve million, eleven thousand, nine hundred seventy-one".