20011002111187 has 2 divisors, whose sum is σ = 20011002111188. Its totient is φ = 20011002111186.

The previous prime is 20011002111077. The next prime is 20011002111223. The reversal of 20011002111187 is 78111120011002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011002111187 is a prime.

It is a super-2 number, since 2×20011002111187² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20011002117187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005501055593 + 10005501055594.

It is an arithmetic number, because the mean of its divisors is an integer number (10005501055594).

Almost surely, 2^{20011002111187} is an apocalyptic number.

20011002111187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011002111187 is an equidigital number, since it uses as much as digits as its factorization.

20011002111187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 25.

Adding to 20011002111187 its reverse (78111120011002), we get a palindrome (98122122122189).

The spelling of 20011002111187 in words is "twenty trillion, eleven billion, two million, one hundred eleven thousand, one hundred eighty-seven".