1223131311031 has 4 divisors (see below), whose sum is σ = 1397864355472. Its totient is φ = 1048398266592.

The previous prime is 1223131311023. The next prime is 1223131311091. The reversal of 1223131311031 is 1301131313221.

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 1223131311031 - 2³ = 1223131311023 is a prime.

It is a super-2 number, since 2×1223131311031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223131310993 and 1223131311011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223131311091) 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, 87366522210 + ... + 87366522223.

It is an arithmetic number, because the mean of its divisors is an integer number (349466088868).

Almost surely, 2^{1223131311031} is an apocalyptic number.

1223131311031 is a deficient number, since it is larger than the sum of its proper divisors (174733044441).

1223131311031 is an equidigital number, since it uses as much as digits as its factorization.

1223131311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174733044440.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1223131311031 its reverse (1301131313221), we get a palindrome (2524262624252).

The spelling of 1223131311031 in words is "one trillion, two hundred twenty-three billion, one hundred thirty-one million, three hundred eleven thousand, thirty-one".