1231210211 has 36 divisors (see below), whose sum is σ = 1582003080. Its totient is φ = 954676800.

The previous prime is 1231210163. The next prime is 1231210237. The reversal of 1231210211 is 1120121321.

It is not a de Polignac number, because 1231210211 - 2⁶ = 1231210147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231210411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1665680 + ... + 1666418.

It is an arithmetic number, because the mean of its divisors is an integer number (43944530).

Almost surely, 2^1231210211 is an apocalyptic number.

1231210211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231210211 is a deficient number, since it is larger than the sum of its proper divisors (350792869).

1231210211 is a wasteful number, since it uses less digits than its factorization.

1231210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1231210211 is about 35088.6051446905. The cubic root of 1231210211 is about 1071.7925555914.

Adding to 1231210211 its reverse (1120121321), we get a palindrome (2351331532).

The spelling of 1231210211 in words is "one billion, two hundred thirty-one million, two hundred ten thousand, two hundred eleven".