31321031223011 has 4 divisors (see below), whose sum is σ = 31321042759032. Its totient is φ = 31321019686992.

The previous prime is 31321031222981. The next prime is 31321031223073. The reversal of 31321031223011 is 11032213012313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31321031223011 - 2⁴² = 26922984711907 is a prime.

It is a super-2 number, since 2×31321031223011² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321031223091) 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, 789956 + ... + 7953998.

It is an arithmetic number, because the mean of its divisors is an integer number (7830260689758).

Almost surely, 2^{31321031223011} is an apocalyptic number.

31321031223011 is a deficient number, since it is larger than the sum of its proper divisors (11536021).

31321031223011 is an equidigital number, since it uses as much as digits as its factorization.

31321031223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11536020.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31321031223011 its reverse (11032213012313), we get a palindrome (42353244235324).

The spelling of 31321031223011 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-one million, two hundred twenty-three thousand, eleven".