1321333220131 has 4 divisors (see below), whose sum is σ = 1322246375152. Its totient is φ = 1320420065112.

The previous prime is 1321333220099. The next prime is 1321333220147. The reversal of 1321333220131 is 1310223331231.

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 1321333220131 - 2⁵ = 1321333220099 is a prime.

It is a super-2 number, since 2×1321333220131² (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 = 1321333220096 and 1321333220105.

It is not an unprimeable number, because it can be changed into a prime (1321333220731) 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, 456575340 + ... + 456578233.

It is an arithmetic number, because the mean of its divisors is an integer number (330561593788).

Almost surely, 2^{1321333220131} is an apocalyptic number.

1321333220131 is a deficient number, since it is larger than the sum of its proper divisors (913155021).

1321333220131 is an equidigital number, since it uses as much as digits as its factorization.

1321333220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913155020.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1321333220131 its reverse (1310223331231), we get a palindrome (2631556551362).

The spelling of 1321333220131 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-three million, two hundred twenty thousand, one hundred thirty-one".