1323131221131 has 16 divisors (see below), whose sum is σ = 1840964490240. Its totient is φ = 843696311040.

The previous prime is 1323131221121. The next prime is 1323131221157. The reversal of 1323131221131 is 1311221313231.

It is not a de Polignac number, because 1323131221131 - 2⁶ = 1323131221067 is a prime.

It is a super-2 number, since 2×1323131221131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1323131221121) 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, 1070715 + ... + 1947483.

It is an arithmetic number, because the mean of its divisors is an integer number (115060280640).

Almost surely, 2^{1323131221131} is an apocalyptic number.

1323131221131 is a deficient number, since it is larger than the sum of its proper divisors (517833269109).

1323131221131 is a wasteful number, since it uses less digits than its factorization.

1323131221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898666.

The product of its digits is 648, while the sum is 24.

Adding to 1323131221131 its reverse (1311221313231), we get a palindrome (2634352534362).

The spelling of 1323131221131 in words is "one trillion, three hundred twenty-three billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty-one".