1231211230123 has 8 divisors (see below), whose sum is σ = 1407218712320. Its totient is φ = 1055233788840.

The previous prime is 1231211230087. The next prime is 1231211230163. The reversal of 1231211230123 is 3210321121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1231211230123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231211230094 and 1231211230103.

It is not an unprimeable number, because it can be changed into a prime (1231211230163) 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 7 ways as a sum of consecutive naturals, for example, 7422333 + ... + 7586398.

It is an arithmetic number, because the mean of its divisors is an integer number (175902339040).

Almost surely, 2^{1231211230123} is an apocalyptic number.

1231211230123 is a deficient number, since it is larger than the sum of its proper divisors (176007482197).

1231211230123 is a wasteful number, since it uses less digits than its factorization.

1231211230123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15020457.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1231211230123 its reverse (3210321121321), we get a palindrome (4441532351444).

The spelling of 1231211230123 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, two hundred thirty thousand, one hundred twenty-three".