71220123011 has 8 divisors (see below), whose sum is σ = 74193764400. Its totient is φ = 68305365760.

The previous prime is 71220122971. The next prime is 71220123041. The reversal of 71220123011 is 11032102217.

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

It is a cyclic number.

It is not a de Polignac number, because 71220123011 - 2²⁶ = 71153014147 is a prime.

It is a super-2 number, since 2×71220123011² (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 (71220123041) 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, 14718566 + ... + 14723403.

It is an arithmetic number, because the mean of its divisors is an integer number (9274220550).

Almost surely, 2^71220123011 is an apocalyptic number.

71220123011 is a deficient number, since it is larger than the sum of its proper divisors (2973641389).

71220123011 is a wasteful number, since it uses less digits than its factorization.

71220123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29442069.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 71220123011 its reverse (11032102217), we get a palindrome (82252225228).

The spelling of 71220123011 in words is "seventy-one billion, two hundred twenty million, one hundred twenty-three thousand, eleven".