2101212212087 has 2 divisors, whose sum is σ = 2101212212088. Its totient is φ = 2101212212086.

The previous prime is 2101212212053. The next prime is 2101212212111. The reversal of 2101212212087 is 7802122121012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101212212087 - 2¹⁸ = 2101211949943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101212212017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050606106043 + 1050606106044.

It is an arithmetic number, because the mean of its divisors is an integer number (1050606106044).

Almost surely, 2^{2101212212087} is an apocalyptic number.

2101212212087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101212212087 is an equidigital number, since it uses as much as digits as its factorization.

2101212212087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 2101212212087 its reverse (7802122121012), we get a palindrome (9903334333099).

The spelling of 2101212212087 in words is "two trillion, one hundred one billion, two hundred twelve million, two hundred twelve thousand, eighty-seven".