1231211231211 has 32 divisors (see below), whose sum is σ = 1794942688000. Its totient is φ = 746084110464.

The previous prime is 1231211231203. The next prime is 1231211231249. The reversal of 1231211231211 is 1121321121321.

It is not a de Polignac number, because 1231211231211 - 2³ = 1231211231203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231211231711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7097436 + ... + 7268838.

It is an arithmetic number, because the mean of its divisors is an integer number (56091959000).

Almost surely, 2^{1231211231211} is an apocalyptic number.

1231211231211 is a deficient number, since it is larger than the sum of its proper divisors (563731456789).

1231211231211 is a wasteful number, since it uses less digits than its factorization.

1231211231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174235.

The product of its digits is 144, while the sum is 21.

Adding to 1231211231211 its reverse (1121321121321), we get a palindrome (2352532352532).

The spelling of 1231211231211 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, two hundred thirty-one thousand, two hundred eleven".