31401401321311 has 4 divisors (see below), whose sum is σ = 35887315795792. Its totient is φ = 26915486846832.

The previous prime is 31401401321221. The next prime is 31401401321317. The reversal of 31401401321311 is 11312310410413.

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 31401401321311 - 2¹¹ = 31401401319263 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 (31401401321317) 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, 2242957237230 + ... + 2242957237243.

It is an arithmetic number, because the mean of its divisors is an integer number (8971828948948).

Almost surely, 2^{31401401321311} is an apocalyptic number.

31401401321311 is a deficient number, since it is larger than the sum of its proper divisors (4485914474481).

31401401321311 is an equidigital number, since it uses as much as digits as its factorization.

31401401321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485914474480.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 31401401321311 its reverse (11312310410413), we get a palindrome (42713711731724).

The spelling of 31401401321311 in words is "thirty-one trillion, four hundred one billion, four hundred one million, three hundred twenty-one thousand, three hundred eleven".