1231202233123 has 4 divisors (see below), whose sum is σ = 1239355890448. Its totient is φ = 1223048575800.

The previous prime is 1231202233103. The next prime is 1231202233229. The reversal of 1231202233123 is 3213322021321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231202233123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231202233103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4076828436 + ... + 4076828737.

It is an arithmetic number, because the mean of its divisors is an integer number (309838972612).

Almost surely, 2^{1231202233123} is an apocalyptic number.

1231202233123 is a deficient number, since it is larger than the sum of its proper divisors (8153657325).

1231202233123 is an equidigital number, since it uses as much as digits as its factorization.

1231202233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153657324.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1231202233123 its reverse (3213322021321), we get a palindrome (4444524254444).

The spelling of 1231202233123 in words is "one trillion, two hundred thirty-one billion, two hundred two million, two hundred thirty-three thousand, one hundred twenty-three".