2101122110987 has 2 divisors, whose sum is σ = 2101122110988. Its totient is φ = 2101122110986.

The previous prime is 2101122110977. The next prime is 2101122111013. The reversal of 2101122110987 is 7890112211012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101122110987 - 2¹⁰ = 2101122109963 is a prime.

It is a super-2 number, since 2×2101122110987² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101122110977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050561055493 + 1050561055494.

It is an arithmetic number, because the mean of its divisors is an integer number (1050561055494).

Almost surely, 2^{2101122110987} is an apocalyptic number.

2101122110987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101122110987 is an equidigital number, since it uses as much as digits as its factorization.

2101122110987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 35.

Adding to 2101122110987 its reverse (7890112211012), we get a palindrome (9991234321999).

The spelling of 2101122110987 in words is "two trillion, one hundred one billion, one hundred twenty-two million, one hundred ten thousand, nine hundred eighty-seven".