31123201122 has 48 divisors (see below), whose sum is σ = 72677332728. Its totient is φ = 9568915200.

The previous prime is 31123201117. The next prime is 31123201139. The reversal of 31123201122 is 22110232113.

31123201122 is a `hidden beast` number, since 311 + 2 + 320 + 11 + 22 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9648936441 + 21474264681 = 98229^2 + 146541^2 .

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 = 31123201095 and 31123201104.

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 23 ways as a sum of consecutive naturals, for example, 253318 + ... + 355550.

Almost surely, 2^31123201122 is an apocalyptic number.

31123201122 is an abundant number, since it is smaller than the sum of its proper divisors (41554131606).

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

31123201122 is a wasteful number, since it uses less digits than its factorization.

31123201122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103555 (or 103552 counting only the distinct ones).

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

Adding to 31123201122 its reverse (22110232113), we get a palindrome (53233433235).

The spelling of 31123201122 in words is "thirty-one billion, one hundred twenty-three million, two hundred one thousand, one hundred twenty-two".