3121133431223 has 4 divisors (see below), whose sum is σ = 3123539857680. Its totient is φ = 3118727004768.

The previous prime is 3121133431189. The next prime is 3121133431231. The reversal of 3121133431223 is 3221343311213.

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 3121133431223 - 2¹² = 3121133427127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121133431253) 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, 1203211283 + ... + 1203213876.

It is an arithmetic number, because the mean of its divisors is an integer number (780884964420).

Almost surely, 2^{3121133431223} is an apocalyptic number.

3121133431223 is a deficient number, since it is larger than the sum of its proper divisors (2406426457).

3121133431223 is a wasteful number, since it uses less digits than its factorization.

3121133431223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406426456.

The product of its digits is 7776, while the sum is 29.

Adding to 3121133431223 its reverse (3221343311213), we get a palindrome (6342476742436).

The spelling of 3121133431223 in words is "three trillion, one hundred twenty-one billion, one hundred thirty-three million, four hundred thirty-one thousand, two hundred twenty-three".