2121534988511 has 2 divisors, whose sum is σ = 2121534988512. Its totient is φ = 2121534988510.

The previous prime is 2121534988483. The next prime is 2121534988607. The reversal of 2121534988511 is 1158894351212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121534988511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121534988511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121534988211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060767494255 + 1060767494256.

It is an arithmetic number, because the mean of its divisors is an integer number (1060767494256).

Almost surely, 2^{2121534988511} is an apocalyptic number.

2121534988511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121534988511 is an equidigital number, since it uses as much as digits as its factorization.

2121534988511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 50.

The spelling of 2121534988511 in words is "two trillion, one hundred twenty-one billion, five hundred thirty-four million, nine hundred eighty-eight thousand, five hundred eleven".