71220516123 has 8 divisors (see below), whose sum is σ = 99958619200. Its totient is φ = 44981378568.

The previous prime is 71220516121. The next prime is 71220516137. The reversal of 71220516123 is 32161502217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71220516123 - 2¹ = 71220516121 is a prime.

It is a super-2 number, since 2×71220516123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71220516121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624741313 + ... + 624741426.

It is an arithmetic number, because the mean of its divisors is an integer number (12494827400).

Almost surely, 2^71220516123 is an apocalyptic number.

71220516123 is a deficient number, since it is larger than the sum of its proper divisors (28738103077).

71220516123 is a wasteful number, since it uses less digits than its factorization.

71220516123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249482761.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 71220516123 in words is "seventy-one billion, two hundred twenty million, five hundred sixteen thousand, one hundred twenty-three".