211120020187 has 2 divisors, whose sum is σ = 211120020188. Its totient is φ = 211120020186.

The previous prime is 211120020151. The next prime is 211120020217. The reversal of 211120020187 is 781020021112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211120020187 is a prime.

It is not a weakly prime, because it can be changed into another prime (211120020487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560010093 + 105560010094.

It is an arithmetic number, because the mean of its divisors is an integer number (105560010094).

Almost surely, 2^211120020187 is an apocalyptic number.

211120020187 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120020187 is an equidigital number, since it uses as much as digits as its factorization.

211120020187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 211120020187 its reverse (781020021112), we get a palindrome (992140041299).

The spelling of 211120020187 in words is "two hundred eleven billion, one hundred twenty million, twenty thousand, one hundred eighty-seven".