20211120111187 has 2 divisors, whose sum is σ = 20211120111188. Its totient is φ = 20211120111186.

The previous prime is 20211120111179. The next prime is 20211120111227. The reversal of 20211120111187 is 78111102111202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211120111187 - 2³ = 20211120111179 is a prime.

It is a super-2 number, since 2×20211120111187² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20211120114187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105560055593 + 10105560055594.

It is an arithmetic number, because the mean of its divisors is an integer number (10105560055594).

Almost surely, 2^{20211120111187} is an apocalyptic number.

20211120111187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211120111187 is an equidigital number, since it uses as much as digits as its factorization.

20211120111187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 28.

Adding to 20211120111187 its reverse (78111102111202), we get a palindrome (98322222222389).

The spelling of 20211120111187 in words is "twenty trillion, two hundred eleven billion, one hundred twenty million, one hundred eleven thousand, one hundred eighty-seven".