2121110210987 has 2 divisors, whose sum is σ = 2121110210988. Its totient is φ = 2121110210986.

The previous prime is 2121110210959. The next prime is 2121110211007. The reversal of 2121110210987 is 7890120111212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121110210987 - 2⁸ = 2121110210731 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121110210887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060555105493 + 1060555105494.

It is an arithmetic number, because the mean of its divisors is an integer number (1060555105494).

Almost surely, 2^{2121110210987} is an apocalyptic number.

2121110210987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121110210987 is an equidigital number, since it uses as much as digits as its factorization.

2121110210987 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2121110210987 in words is "two trillion, one hundred twenty-one billion, one hundred ten million, two hundred ten thousand, nine hundred eighty-seven".