1311231223110 has 32 divisors (see below), whose sum is σ = 3166999245792. Its totient is φ = 347434513920.

The previous prime is 1311231223087. The next prime is 1311231223139. The reversal of 1311231223110 is 113221321131.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 139191811 + ... + 139201230.

It is an arithmetic number, because the mean of its divisors is an integer number (98968726431).

Almost surely, 2^{1311231223110} is an apocalyptic number.

1311231223110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311231223110 is an abundant number, since it is smaller than the sum of its proper divisors (1855768022682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311231223110 is a wasteful number, since it uses less digits than its factorization.

1311231223110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278393208.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1311231223110 its reverse (113221321131), we get a palindrome (1424452544241).

The spelling of 1311231223110 in words is "one trillion, three hundred eleven billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred ten".