1231222023013 has 4 divisors (see below), whose sum is σ = 1232077633920. Its totient is φ = 1230366412108.

The previous prime is 1231222022951. The next prime is 1231222023037. The reversal of 1231222023013 is 3103202221321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231222023013 - 2²⁹ = 1230685152101 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 (1231222020013) 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, 427803295 + ... + 427806172.

It is an arithmetic number, because the mean of its divisors is an integer number (308019408480).

Almost surely, 2^{1231222023013} is an apocalyptic number.

It is an amenable number.

1231222023013 is a deficient number, since it is larger than the sum of its proper divisors (855610907).

1231222023013 is an equidigital number, since it uses as much as digits as its factorization.

1231222023013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855610906.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1231222023013 its reverse (3103202221321), we get a palindrome (4334424244334).

The spelling of 1231222023013 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-two million, twenty-three thousand, thirteen".