2111212121087 has 2 divisors, whose sum is σ = 2111212121088. Its totient is φ = 2111212121086.

The previous prime is 2111212121059. The next prime is 2111212121147. The reversal of 2111212121087 is 7801212121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111212121087 - 2¹² = 2111212116991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111212121587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055606060543 + 1055606060544.

It is an arithmetic number, because the mean of its divisors is an integer number (1055606060544).

Almost surely, 2^{2111212121087} is an apocalyptic number.

2111212121087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111212121087 is an equidigital number, since it uses as much as digits as its factorization.

2111212121087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 29.

Adding to 2111212121087 its reverse (7801212121112), we get a palindrome (9912424242199).

The spelling of 2111212121087 in words is "two trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, eighty-seven".