72101222 has 8 divisors (see below), whose sum is σ = 108296976. Its totient is φ = 36002232.

The previous prime is 72101209. The next prime is 72101261. The reversal of 72101222 is 22210127.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72101222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22298 + ... + 25325.

It is an arithmetic number, because the mean of its divisors is an integer number (13537122).

Almost surely, 2^72101222 is an apocalyptic number.

72101222 is a deficient number, since it is larger than the sum of its proper divisors (36195754).

72101222 is a wasteful number, since it uses less digits than its factorization.

72101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48382.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 72101222 is about 8491.2438429243. The cubic root of 72101222 is about 416.2116272526.

Adding to 72101222 its reverse (22210127), we get a palindrome (94311349).

The spelling of 72101222 in words is "seventy-two million, one hundred one thousand, two hundred twenty-two".