31323131122 has 8 divisors (see below), whose sum is σ = 47871200556. Its totient is φ = 15366064272.

The previous prime is 31323131039. The next prime is 31323131123. The reversal of 31323131122 is 22113132313.

It can be written as a sum of positive squares in 2 ways, for example, as 29233818441 + 2089312681 = 170979^2 + 45709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31323131122² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323131093 and 31323131102.

It is not an unprimeable number, because it can be changed into a prime (31323131123) 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, 147750513 + ... + 147750724.

Almost surely, 2^31323131122 is an apocalyptic number.

31323131122 is a deficient number, since it is larger than the sum of its proper divisors (16548069434).

31323131122 is a wasteful number, since it uses less digits than its factorization.

31323131122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295501292.

The product of its digits is 648, while the sum is 22.

Adding to 31323131122 its reverse (22113132313), we get a palindrome (53436263435).

The spelling of 31323131122 in words is "thirty-one billion, three hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-two".