1312221131223 has 16 divisors (see below), whose sum is σ = 1800029748960. Its totient is φ = 849695256576.

The previous prime is 1312221131147. The next prime is 1312221131231. The reversal of 1312221131223 is 3221311222131.

It is not a de Polignac number, because 1312221131223 - 2³⁸ = 1037343224279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312221131193 and 1312221131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221135223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10180158 + ... + 10308251.

It is an arithmetic number, because the mean of its divisors is an integer number (112501859310).

Almost surely, 2^{1312221131223} is an apocalyptic number.

1312221131223 is a deficient number, since it is larger than the sum of its proper divisors (487808617737).

1312221131223 is a wasteful number, since it uses less digits than its factorization.

1312221131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20489026.

The product of its digits is 864, while the sum is 24.

Adding to 1312221131223 its reverse (3221311222131), we get a palindrome (4533532353354).

The spelling of 1312221131223 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-three".