1223110212131 has 4 divisors (see below), whose sum is σ = 1223127040752. Its totient is φ = 1223093383512.

The previous prime is 1223110212043. The next prime is 1223110212139. The reversal of 1223110212131 is 1312120113221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223110212131 - 2¹⁰ = 1223110211107 is a prime.

It is a super-2 number, since 2×1223110212131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223110212139) 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 3 ways as a sum of consecutive naturals, for example, 8304815 + ... + 8450808.

It is an arithmetic number, because the mean of its divisors is an integer number (305781760188).

Almost surely, 2^{1223110212131} is an apocalyptic number.

1223110212131 is a deficient number, since it is larger than the sum of its proper divisors (16828621).

1223110212131 is an equidigital number, since it uses as much as digits as its factorization.

1223110212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16828620.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1223110212131 its reverse (1312120113221), we get a palindrome (2535230325352).

The spelling of 1223110212131 in words is "one trillion, two hundred twenty-three billion, one hundred ten million, two hundred twelve thousand, one hundred thirty-one".