1231343123011 has 8 divisors (see below), whose sum is σ = 1234162130000. Its totient is φ = 1228525522560.

The previous prime is 1231343123009. The next prime is 1231343123047. The reversal of 1231343123011 is 1103213431321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231343123011 - 2¹ = 1231343123009 is a prime.

It is a super-2 number, since 2×1231343123011² (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 (1231343123051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411351 + ... + 2110591.

It is an arithmetic number, because the mean of its divisors is an integer number (154270266250).

Almost surely, 2^{1231343123011} is an apocalyptic number.

1231343123011 is a deficient number, since it is larger than the sum of its proper divisors (2819006989).

1231343123011 is an equidigital number, since it uses as much as digits as its factorization.

1231343123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703269.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1231343123011 its reverse (1103213431321), we get a palindrome (2334556554332).

The spelling of 1231343123011 in words is "one trillion, two hundred thirty-one billion, three hundred forty-three million, one hundred twenty-three thousand, eleven".