31012031120 has 80 divisors (see below), whose sum is σ = 82576143360. Its totient is φ = 10610406912.

The previous prime is 31012031119. The next prime is 31012031129. The reversal of 31012031120 is 2113021013.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 31012031095 and 31012031104.

It is not an unprimeable number, because it can be changed into a prime (31012031129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210434 + ... + 326046.

It is an arithmetic number, because the mean of its divisors is an integer number (1032201792).

Almost surely, 2^31012031120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31012031120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41288071680).

31012031120 is an abundant number, since it is smaller than the sum of its proper divisors (51564112240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31012031120 is a wasteful number, since it uses less digits than its factorization.

31012031120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116112 (or 116106 counting only the distinct ones).

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

Adding to 31012031120 its reverse (2113021013), we get a palindrome (33125052133).

The spelling of 31012031120 in words is "thirty-one billion, twelve million, thirty-one thousand, one hundred twenty".