1211033310231 has 32 divisors (see below), whose sum is σ = 1744689369600. Its totient is φ = 746984449920.

The previous prime is 1211033310229. The next prime is 1211033310241. The reversal of 1211033310231 is 1320133301121.

It is a happy number.

It is not a de Polignac number, because 1211033310231 - 2¹ = 1211033310229 is a prime.

It is a super-2 number, since 2×1211033310231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211033310198 and 1211033310207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211033310241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173286 + ... + 1565916.

It is an arithmetic number, because the mean of its divisors is an integer number (54521542800).

Almost surely, 2^{1211033310231} is an apocalyptic number.

1211033310231 is a deficient number, since it is larger than the sum of its proper divisors (533656059369).

1211033310231 is an equidigital number, since it uses as much as digits as its factorization.

1211033310231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392744 (or 1392710 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1211033310231 its reverse (1320133301121), we get a palindrome (2531166611352).

The spelling of 1211033310231 in words is "one trillion, two hundred eleven billion, thirty-three million, three hundred ten thousand, two hundred thirty-one".