71221002112 has 48 divisors (see below), whose sum is σ = 153639472680. Its totient is φ = 32871221760.

The previous prime is 71221002109. The next prime is 71221002119. The reversal of 71221002112 is 21120012217.

It is a super-2 number, since 2×71221002112² (a number of 23 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 71221002112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71221002119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1624564 + ... + 1667827.

Almost surely, 2^71221002112 is an apocalyptic number.

It is an amenable number.

71221002112 is an abundant number, since it is smaller than the sum of its proper divisors (82418470568).

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

71221002112 is a wasteful number, since it uses less digits than its factorization.

71221002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292431 (or 3292406 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 71221002112 its reverse (21120012217), we get a palindrome (92341014329).

The spelling of 71221002112 in words is "seventy-one billion, two hundred twenty-one million, two thousand, one hundred twelve".