20002122111511 has 2 divisors, whose sum is σ = 20002122111512. Its totient is φ = 20002122111510.

The previous prime is 20002122111509. The next prime is 20002122111533. The reversal of 20002122111511 is 11511122120002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20002122111511 - 2¹ = 20002122111509 is a prime.

Together with 20002122111509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002122111581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001061055755 + 10001061055756.

It is an arithmetic number, because the mean of its divisors is an integer number (10001061055756).

Almost surely, 2^{20002122111511} is an apocalyptic number.

20002122111511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002122111511 is an equidigital number, since it uses as much as digits as its factorization.

20002122111511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 20002122111511 its reverse (11511122120002), we get a palindrome (31513244231513).

The spelling of 20002122111511 in words is "twenty trillion, two billion, one hundred twenty-two million, one hundred eleven thousand, five hundred eleven".