1231321202311 has 8 divisors (see below), whose sum is σ = 1296167281920. Its totient is φ = 1166479092792.

The previous prime is 1231321202263. The next prime is 1231321202329. The reversal of 1231321202311 is 1132021231321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231321202311 - 2⁷ = 1231321202183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231321202381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345055 + ... + 1606768.

It is an arithmetic number, because the mean of its divisors is an integer number (162020910240).

Almost surely, 2^{1231321202311} is an apocalyptic number.

1231321202311 is a deficient number, since it is larger than the sum of its proper divisors (64846079609).

1231321202311 is a wasteful number, since it uses less digits than its factorization.

1231321202311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985045.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1231321202311 its reverse (1132021231321), we get a palindrome (2363342433632).

The spelling of 1231321202311 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-one million, two hundred two thousand, three hundred eleven".