20112103031971 has 2 divisors, whose sum is σ = 20112103031972. Its totient is φ = 20112103031970.

The previous prime is 20112103031959. The next prime is 20112103032011. The reversal of 20112103031971 is 17913030121102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20112103031971 - 2⁵ = 20112103031939 is a prime.

It is not a weakly prime, because it can be changed into another prime (20112103031071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056051515985 + 10056051515986.

It is an arithmetic number, because the mean of its divisors is an integer number (10056051515986).

Almost surely, 2^{20112103031971} is an apocalyptic number.

20112103031971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112103031971 is an equidigital number, since it uses as much as digits as its factorization.

20112103031971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 20112103031971 in words is "twenty trillion, one hundred twelve billion, one hundred three million, thirty-one thousand, nine hundred seventy-one".