2111212121587 has 2 divisors, whose sum is σ = 2111212121588. Its totient is φ = 2111212121586.

The previous prime is 2111212121563. The next prime is 2111212121647. The reversal of 2111212121587 is 7851212121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111212121587 - 2¹¹ = 2111212119539 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111212121087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055606060793 + 1055606060794.

It is an arithmetic number, because the mean of its divisors is an integer number (1055606060794).

Almost surely, 2^{2111212121587} is an apocalyptic number.

2111212121587 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111212121587 is an equidigital number, since it uses as much as digits as its factorization.

2111212121587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 34.

Adding to 2111212121587 its reverse (7851212121112), we get a palindrome (9962424242699).

The spelling of 2111212121587 in words is "two trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, five hundred eighty-seven".