201211687 has 2 divisors, whose sum is σ = 201211688. Its totient is φ = 201211686.

The previous prime is 201211679. The next prime is 201211693. The reversal of 201211687 is 786112102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201211687 - 2³ = 201211679 is a prime.

It is a super-2 number, since 2×201211687² = 80972285970771938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605843 + 100605844.

It is an arithmetic number, because the mean of its divisors is an integer number (100605844).

Almost surely, 2^201211687 is an apocalyptic number.

201211687 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211687 is an equidigital number, since it uses as much as digits as its factorization.

201211687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 201211687 is about 14184.9105390200. The cubic root of 201211687 is about 585.9821687314.

Adding to 201211687 its reverse (786112102), we get a palindrome (987323789).

The spelling of 201211687 in words is "two hundred one million, two hundred eleven thousand, six hundred eighty-seven".