71122122 has 48 divisors (see below), whose sum is σ = 160123392. Its totient is φ = 22790880.

The previous prime is 71122027. The next prime is 71122147. The reversal of 71122122 is 22122117.

It is a happy number.

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 = 71122095 and 71122104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109603 + ... + 110249.

It is an arithmetic number, because the mean of its divisors is an integer number (3335904).

Almost surely, 2^71122122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71122122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80061696).

71122122 is an abundant number, since it is smaller than the sum of its proper divisors (89001270).

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

71122122 is a wasteful number, since it uses less digits than its factorization.

71122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 880 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 71122122 is about 8433.3932672442. The cubic root of 71122122 is about 414.3190497269.

Adding to 71122122 its reverse (22122117), we get a palindrome (93244239).

The spelling of 71122122 in words is "seventy-one million, one hundred twenty-two thousand, one hundred twenty-two".