31331123103321 has 6 divisors (see below), whose sum is σ = 45256066704810. Its totient is φ = 20887415402208.

The previous prime is 31331123103311. The next prime is 31331123103347. The reversal of 31331123103321 is 12330132113313.

31331123103321 is a `hidden beast` number, since 3 + 1 + 3 + 3 + 1 + 12 + 310 + 332 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16620339008025 + 14710784095296 = 4076805^2 + 3835464^2 .

It is not a de Polignac number, because 31331123103321 - 2⁶ = 31331123103257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31331123103311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1740617950176 + ... + 1740617950193.

It is an arithmetic number, because the mean of its divisors is an integer number (7542677784135).

Almost surely, 2^{31331123103321} is an apocalyptic number.

It is an amenable number.

31331123103321 is a deficient number, since it is larger than the sum of its proper divisors (13924943601489).

31331123103321 is a wasteful number, since it uses less digits than its factorization.

31331123103321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481235900375 (or 3481235900372 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

Adding to 31331123103321 its reverse (12330132113313), we get a palindrome (43661255216634).

The spelling of 31331123103321 in words is "thirty-one trillion, three hundred thirty-one billion, one hundred twenty-three million, one hundred three thousand, three hundred twenty-one".