31122123443404 has 72 divisors (see below), whose sum is σ = 63728731655232. Its totient is φ = 13259746241280.

The previous prime is 31122123443371. The next prime is 31122123443459. The reversal of 31122123443404 is 40434432122113.

It is a super-2 number, since 2×31122123443404² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31122123443404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23632954 + ... + 24915070.

Almost surely, 2^{31122123443404} 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 31122123443404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31864365827616).

31122123443404 is an abundant number, since it is smaller than the sum of its proper divisors (32606608211828).

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

31122123443404 is a wasteful number, since it uses less digits than its factorization.

31122123443404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282863 (or 1282854 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 31122123443404 its reverse (40434432122113), we get a palindrome (71556555565517).

The spelling of 31122123443404 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred twenty-three million, four hundred forty-three thousand, four hundred four".