31321223231111 has 8 divisors (see below), whose sum is σ = 34470984217104. Its totient is φ = 28221858421120.

The previous prime is 31321223231101. The next prime is 31321223231143. The reversal of 31321223231111 is 11113232212313.

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 31321223231111 - 2²⁶ = 31321156122247 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 (31321223231101) 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, 12599042696 + ... + 12599045181.

It is an arithmetic number, because the mean of its divisors is an integer number (4308873027138).

Almost surely, 2^{31321223231111} is an apocalyptic number.

31321223231111 is a deficient number, since it is larger than the sum of its proper divisors (3149760985993).

31321223231111 is a wasteful number, since it uses less digits than its factorization.

31321223231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25198088001.

The product of its digits is 1296, while the sum is 26.

Adding to 31321223231111 its reverse (11113232212313), we get a palindrome (42434455443424).

The spelling of 31321223231111 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred eleven".