31120122 has 32 divisors (see below), whose sum is σ = 68612544. Its totient is φ = 9331200.

The previous prime is 31120121. The next prime is 31120153. The reversal of 31120122 is 22102113.

It is a junction number, because it is equal to n+sod(n) for n = 31120098 and 31120107.

It is not an unprimeable number, because it can be changed into a prime (31120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972 + ... + 8832.

It is an arithmetic number, because the mean of its divisors is an integer number (2144142).

Almost surely, 2^31120122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31120122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34306272).

31120122 is an abundant number, since it is smaller than the sum of its proper divisors (37492422).

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

31120122 is a wasteful number, since it uses less digits than its factorization.

31120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 31120122 is about 5578.5412071616. The cubic root of 31120122 is about 314.5432938159.

Adding to 31120122 its reverse (22102113), we get a palindrome (53222235).

Subtracting from 31120122 its reverse (22102113), we obtain a square (9018009 = 3003²).

The spelling of 31120122 in words is "thirty-one million, one hundred twenty thousand, one hundred twenty-two".