71222012 has 12 divisors (see below), whose sum is σ = 126346416. Its totient is φ = 35123040.

The previous prime is 71221991. The next prime is 71222023. The reversal of 71222012 is 21022217.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121664 + ... + 122247.

It is an arithmetic number, because the mean of its divisors is an integer number (10528868).

Almost surely, 2^71222012 is an apocalyptic number.

It is an amenable number.

71222012 is a deficient number, since it is larger than the sum of its proper divisors (55124404).

71222012 is a wasteful number, since it uses less digits than its factorization.

71222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243988 (or 243986 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 71222012 is about 8439.3134791877. The cubic root of 71222012 is about 414.5129273762.

Adding to 71222012 its reverse (21022217), we get a palindrome (92244229).

The spelling of 71222012 in words is "seventy-one million, two hundred twenty-two thousand, twelve".