72123110311 has 16 divisors (see below), whose sum is σ = 83687053824. Its totient is φ = 60874998624.

The previous prime is 72123110303. The next prime is 72123110321. The reversal of 72123110311 is 11301132127.

It is a cyclic number.

It is not a de Polignac number, because 72123110311 - 2³ = 72123110303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72123110321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1335021 + ... + 1387993.

It is an arithmetic number, because the mean of its divisors is an integer number (5230440864).

Almost surely, 2^72123110311 is an apocalyptic number.

72123110311 is a deficient number, since it is larger than the sum of its proper divisors (11563943513).

72123110311 is a wasteful number, since it uses less digits than its factorization.

72123110311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55950.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 72123110311 its reverse (11301132127), we get a palindrome (83424242438).

The spelling of 72123110311 in words is "seventy-two billion, one hundred twenty-three million, one hundred ten thousand, three hundred eleven".