1223131311023 has 2 divisors, whose sum is σ = 1223131311024. Its totient is φ = 1223131311022.

The previous prime is 1223131311019. The next prime is 1223131311091. The reversal of 1223131311023 is 3201131313221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223131311023 - 2² = 1223131311019 is a prime.

It is a super-2 number, since 2×1223131311023² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223131311023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223131313023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611565655511 + 611565655512.

It is an arithmetic number, because the mean of its divisors is an integer number (611565655512).

Almost surely, 2^{1223131311023} is an apocalyptic number.

1223131311023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223131311023 is an equidigital number, since it uses as much as digits as its factorization.

1223131311023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1223131311023 its reverse (3201131313221), we get a palindrome (4424262624244).

The spelling of 1223131311023 in words is "one trillion, two hundred twenty-three billion, one hundred thirty-one million, three hundred eleven thousand, twenty-three".