210211131987 has 8 divisors (see below), whose sum is σ = 311423899280. Its totient is φ = 140140754640.

The previous prime is 210211131961. The next prime is 210211131989. The reversal of 210211131987 is 789131112012.

210211131987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210211131987 - 2¹² = 210211127891 is a prime.

It is a super-2 number, since 2×210211131987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210211131989) 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 in 7 ways as a sum of consecutive naturals, for example, 3892798714 + ... + 3892798767.

It is an arithmetic number, because the mean of its divisors is an integer number (38927987410).

Almost surely, 2^210211131987 is an apocalyptic number.

210211131987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

210211131987 is a deficient number, since it is larger than the sum of its proper divisors (101212767293).

210211131987 is an equidigital number, since it uses as much as digits as its factorization.

210211131987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7785597490 (or 7785597484 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 36.

Adding to 210211131987 its reverse (789131112012), we get a palindrome (999342243999).

The spelling of 210211131987 in words is "two hundred ten billion, two hundred eleven million, one hundred thirty-one thousand, nine hundred eighty-seven".