1321023011331 has 8 divisors (see below), whose sum is σ = 1762501118800. Its totient is φ = 880113455712.

The previous prime is 1321023011221. The next prime is 1321023011353. The reversal of 1321023011331 is 1331103201231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321023011331 - 2¹⁸ = 1321022749187 is a prime.

It is a super-3 number, since 3×1321023011331³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321023011298 and 1321023011307.

It is not an unprimeable number, because it can be changed into a prime (1321023011381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142132540 + ... + 142141833.

It is an arithmetic number, because the mean of its divisors is an integer number (220312639850).

Almost surely, 2^{1321023011331} is an apocalyptic number.

1321023011331 is a deficient number, since it is larger than the sum of its proper divisors (441478107469).

1321023011331 is a wasteful number, since it uses less digits than its factorization.

1321023011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284275925.

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

Adding to 1321023011331 its reverse (1331103201231), we get a palindrome (2652126212562).

The spelling of 1321023011331 in words is "one trillion, three hundred twenty-one billion, twenty-three million, eleven thousand, three hundred thirty-one".