2120199999971 has 2 divisors, whose sum is σ = 2120199999972. Its totient is φ = 2120199999970.

The previous prime is 2120199999887. The next prime is 2120200000049. The reversal of 2120199999971 is 1799999910212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2120199999971 - 2³⁰ = 2119126258147 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120199992971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060099999985 + 1060099999986.

It is an arithmetic number, because the mean of its divisors is an integer number (1060099999986).

Almost surely, 2^{2120199999971} is an apocalyptic number.

2120199999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120199999971 is an equidigital number, since it uses as much as digits as its factorization.

2120199999971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14880348, while the sum is 68.

The spelling of 2120199999971 in words is "two trillion, one hundred twenty billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".