72110121 has 8 divisors (see below), whose sum is σ = 96194304. Its totient is φ = 48049680.

The previous prime is 72110117. The next prime is 72110131. The reversal of 72110121 is 12101127.

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

It is not a de Polignac number, because 72110121 - 2² = 72110117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72110121.

It is not an unprimeable number, because it can be changed into a prime (72110131) 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, 3135 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (12024288).

Almost surely, 2^72110121 is an apocalyptic number.

It is an amenable number.

72110121 is a deficient number, since it is larger than the sum of its proper divisors (24084183).

72110121 is a wasteful number, since it uses less digits than its factorization.

72110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11871.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 72110121 is about 8491.7678371468. The cubic root of 72110121 is about 416.2287500086.

Adding to 72110121 its reverse (12101127), we get a palindrome (84211248).

The spelling of 72110121 in words is "seventy-two million, one hundred ten thousand, one hundred twenty-one".