1321023130131 has 4 divisors (see below), whose sum is σ = 1761364173512. Its totient is φ = 880682086752.

The previous prime is 1321023130127. The next prime is 1321023130157. The reversal of 1321023130131 is 1310313201231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1321023130131 - 2² = 1321023130127 is a prime.

It is a super-2 number, since 2×1321023130131² (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 = 1321023130098 and 1321023130107.

It is not an unprimeable number, because it can be changed into a prime (1321023130111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220170521686 + ... + 220170521691.

It is an arithmetic number, because the mean of its divisors is an integer number (440341043378).

Almost surely, 2^{1321023130131} is an apocalyptic number.

1321023130131 is a deficient number, since it is larger than the sum of its proper divisors (440341043381).

1321023130131 is an equidigital number, since it uses as much as digits as its factorization.

1321023130131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440341043380.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1321023130131 its reverse (1310313201231), we get a palindrome (2631336331362).

The spelling of 1321023130131 in words is "one trillion, three hundred twenty-one billion, twenty-three million, one hundred thirty thousand, one hundred thirty-one".