1321310322011 has 12 divisors (see below), whose sum is σ = 1344422151072. Its totient is φ = 1298589228000.

The previous prime is 1321310321963. The next prime is 1321310322049. The reversal of 1321310322011 is 1102230131231.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1321310322011 is a prime.

It is a super-2 number, since 2×1321310322011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321310322911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4436321 + ... + 4724781.

It is an arithmetic number, because the mean of its divisors is an integer number (112035179256).

Almost surely, 2^{1321310322011} is an apocalyptic number.

1321310322011 is a deficient number, since it is larger than the sum of its proper divisors (23111829061).

1321310322011 is an equidigital number, since it uses as much as digits as its factorization.

1321310322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289814 (or 289753 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321310322011 its reverse (1102230131231), we get a palindrome (2423540453242).

The spelling of 1321310322011 in words is "one trillion, three hundred twenty-one billion, three hundred ten million, three hundred twenty-two thousand, eleven".