2120199999887 has 2 divisors, whose sum is σ = 2120199999888. Its totient is φ = 2120199999886.

The previous prime is 2120199999877. The next prime is 2120199999971. The reversal of 2120199999887 is 7889999910212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120199999887 - 2¹⁰ = 2120199998863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120199999817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060099999943 + 1060099999944.

It is an arithmetic number, because the mean of its divisors is an integer number (1060099999944).

Almost surely, 2^{2120199999887} is an apocalyptic number.

2120199999887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120199999887 is an equidigital number, since it uses as much as digits as its factorization.

2120199999887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 74.

The spelling of 2120199999887 in words is "two trillion, one hundred twenty billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred eighty-seven".