31210120323 has 12 divisors (see below), whose sum is σ = 45098097408. Its totient is φ = 20798987280.

The previous prime is 31210120307. The next prime is 31210120343. The reversal of 31210120323 is 32302101213.

31210120323 is a `hidden beast` number, since 312 + 10 + 1 + 20 + 323 = 666.

It is not a de Polignac number, because 31210120323 - 2⁴ = 31210120307 is a prime.

It is a super-2 number, since 2×31210120323² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31210120296 and 31210120305.

It is not an unprimeable number, because it can be changed into a prime (31210120303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 621108 + ... + 669473.

It is an arithmetic number, because the mean of its divisors is an integer number (3758174784).

Almost surely, 2^31210120323 is an apocalyptic number.

31210120323 is a deficient number, since it is larger than the sum of its proper divisors (13887977085).

31210120323 is a wasteful number, since it uses less digits than its factorization.

31210120323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293274 (or 1293271 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31210120323 its reverse (32302101213), we get a palindrome (63512221536).

The spelling of 31210120323 in words is "thirty-one billion, two hundred ten million, one hundred twenty thousand, three hundred twenty-three".