71221218000 has 160 divisors (see below), whose sum is σ = 229859490432. Its totient is φ = 18972288000.

The previous prime is 71221217989. The next prime is 71221218023. The reversal of 71221218000 is 81212217.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6192255 + ... + 6203745.

Almost surely, 2^71221218000 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 71221218000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114929745216).

71221218000 is an abundant number, since it is smaller than the sum of its proper divisors (158638272432).

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

71221218000 is a wasteful number, since it uses less digits than its factorization.

71221218000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12550 (or 12534 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The spelling of 71221218000 in words is "seventy-one billion, two hundred twenty-one million, two hundred eighteen thousand".