71021020000 has 240 divisors, whose sum is σ = 204569541792. Its totient is φ = 23754240000.

The previous prime is 71021019997. The next prime is 71021020013. The reversal of 71021020000 is 2012017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5733814 + ... + 5746186.

Almost surely, 2^71021020000 is an apocalyptic number.

71021020000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71021020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102284770896).

71021020000 is an abundant number, since it is smaller than the sum of its proper divisors (133548521792).

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

71021020000 is a wasteful number, since it uses less digits than its factorization.

71021020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12451 (or 12428 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

Adding to 71021020000 its reverse (2012017), we get a palindrome (71023032017).

The spelling of 71021020000 in words is "seventy-one billion, twenty-one million, twenty thousand".