31120012031 has 8 divisors (see below), whose sum is σ = 33276846384. Its totient is φ = 28999427200.

The previous prime is 31120012019. The next prime is 31120012057. The reversal of 31120012031 is 13021002113.

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

It is a cyclic number.

It is not a de Polignac number, because 31120012031 - 2²² = 31115817727 is a prime.

It is a super-2 number, since 2×31120012031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31120011997 and 31120012015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120011031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9060605 + ... + 9064038.

It is an arithmetic number, because the mean of its divisors is an integer number (4159605798).

Almost surely, 2^31120012031 is an apocalyptic number.

31120012031 is a deficient number, since it is larger than the sum of its proper divisors (2156834353).

31120012031 is a wasteful number, since it uses less digits than its factorization.

31120012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18124761.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31120012031 its reverse (13021002113), we get a palindrome (44141014144).

The spelling of 31120012031 in words is "thirty-one billion, one hundred twenty million, twelve thousand, thirty-one".