31123231210 has 8 divisors (see below), whose sum is σ = 56021816196. Its totient is φ = 12449292480.

The previous prime is 31123231193. The next prime is 31123231229. The reversal of 31123231210 is 1213232113.

It can be written as a sum of positive squares in 2 ways, for example, as 30971424169 + 151807041 = 175987^2 + 12321^2 .

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

It is a super-2 number, since 2×31123231210² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556161551 + ... + 1556161570.

Almost surely, 2^31123231210 is an apocalyptic number.

31123231210 is a deficient number, since it is larger than the sum of its proper divisors (24898584986).

31123231210 is a wasteful number, since it uses less digits than its factorization.

31123231210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112323128.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31123231210 its reverse (1213232113), we get a palindrome (32336463323).

The spelling of 31123231210 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred ten".