31321111200311 has 4 divisors (see below), whose sum is σ = 32085040741824. Its totient is φ = 30557181658800.

The previous prime is 31321111200307. The next prime is 31321111200331. The reversal of 31321111200311 is 11300211112313.

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 31321111200311 - 2² = 31321111200307 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 (31321111200331) 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, 381964770695 + ... + 381964770776.

It is an arithmetic number, because the mean of its divisors is an integer number (8021260185456).

Almost surely, 2^{31321111200311} is an apocalyptic number.

31321111200311 is a deficient number, since it is larger than the sum of its proper divisors (763929541513).

31321111200311 is an equidigital number, since it uses as much as digits as its factorization.

31321111200311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763929541512.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31321111200311 its reverse (11300211112313), we get a palindrome (42621322312624).

The spelling of 31321111200311 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred eleven million, two hundred thousand, three hundred eleven".