72120011122 has 4 divisors (see below), whose sum is σ = 108180016686. Its totient is φ = 36060005560.

The previous prime is 72120011113. The next prime is 72120011129. The reversal of 72120011122 is 22111002127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70798034241 + 1321976881 = 266079^2 + 36359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72120011122.

It is not an unprimeable number, because it can be changed into a prime (72120011129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18030002779 + ... + 18030002782.

Almost surely, 2^72120011122 is an apocalyptic number.

72120011122 is a deficient number, since it is larger than the sum of its proper divisors (36060005564).

72120011122 is a wasteful number, since it uses less digits than its factorization.

72120011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36060005563.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 72120011122 its reverse (22111002127), we get a palindrome (94231013249).

The spelling of 72120011122 in words is "seventy-two billion, one hundred twenty million, eleven thousand, one hundred twenty-two".