31122103122 has 64 divisors (see below), whose sum is σ = 75826944000. Its totient is φ = 9383513040.

The previous prime is 31122103097. The next prime is 31122103153. The reversal of 31122103122 is 22130122113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31122103095 and 31122103104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13438 + ... + 249849.

It is an arithmetic number, because the mean of its divisors is an integer number (1184796000).

Almost surely, 2^31122103122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31122103122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37913472000).

31122103122 is an abundant number, since it is smaller than the sum of its proper divisors (44704840878).

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

31122103122 is a wasteful number, since it uses less digits than its factorization.

31122103122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263508 (or 263502 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31122103122 its reverse (22130122113), we get a palindrome (53252225235).

The spelling of 31122103122 in words is "thirty-one billion, one hundred twenty-two million, one hundred three thousand, one hundred twenty-two".