1231111203223 has 8 divisors (see below), whose sum is σ = 1343252574720. Its totient is φ = 1119006860280.

The previous prime is 1231111203221. The next prime is 1231111203269. The reversal of 1231111203223 is 3223021111321.

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 1231111203223 - 2¹ = 1231111203221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231111203194 and 1231111203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231111203221) 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, 9187593 + ... + 9320626.

It is an arithmetic number, because the mean of its divisors is an integer number (167906571840).

Almost surely, 2^{1231111203223} is an apocalyptic number.

1231111203223 is a deficient number, since it is larger than the sum of its proper divisors (112141371497).

1231111203223 is a wasteful number, since it uses less digits than its factorization.

1231111203223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18514277.

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

Adding to 1231111203223 its reverse (3223021111321), we get a palindrome (4454132314544).

The spelling of 1231111203223 in words is "one trillion, two hundred thirty-one billion, one hundred eleven million, two hundred three thousand, two hundred twenty-three".