71121012 has 12 divisors (see below), whose sum is σ = 165949056. Its totient is φ = 23707000.

The previous prime is 71120989. The next prime is 71121023. The reversal of 71121012 is 21012117.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 71120982 and 71121000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2963364 + ... + 2963387.

It is an arithmetic number, because the mean of its divisors is an integer number (13829088).

Almost surely, 2^71121012 is an apocalyptic number.

It is an amenable number.

71121012 is an abundant number, since it is smaller than the sum of its proper divisors (94828044).

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

71121012 is a wasteful number, since it uses less digits than its factorization.

71121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926758 (or 5926756 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 71121012 is about 8433.3274571785. The cubic root of 71121012 is about 414.3168942956.

Adding to 71121012 its reverse (21012117), we get a palindrome (92133129).

The spelling of 71121012 in words is "seventy-one million, one hundred twenty-one thousand, twelve".