31123131002 has 8 divisors (see below), whose sum is σ = 46971106176. Its totient is φ = 15466095612.

The previous prime is 31123130939. The next prime is 31123131023. The reversal of 31123131002 is 20013132113.

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

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, 47734538 + ... + 47735189.

It is an arithmetic number, because the mean of its divisors is an integer number (5871388272).

Almost surely, 2^31123131002 is an apocalyptic number.

31123131002 is a deficient number, since it is larger than the sum of its proper divisors (15847975174).

31123131002 is a wasteful number, since it uses less digits than its factorization.

31123131002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95469892.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31123131002 its reverse (20013132113), we get a palindrome (51136263115).

The spelling of 31123131002 in words is "thirty-one billion, one hundred twenty-three million, one hundred thirty-one thousand, two".