72210011111 has 16 divisors (see below), whose sum is σ = 83333627904. Its totient is φ = 61289391744.

The previous prime is 72210011051. The next prime is 72210011113. The reversal of 72210011111 is 11111001227.

It is a de Polignac number, because none of the positive numbers 2^k-72210011111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72210011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72210011113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817826 + ... + 901808.

It is an arithmetic number, because the mean of its divisors is an integer number (5208351744).

Almost surely, 2^72210011111 is an apocalyptic number.

72210011111 is a deficient number, since it is larger than the sum of its proper divisors (11123616793).

72210011111 is a wasteful number, since it uses less digits than its factorization.

72210011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85190.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 72210011111 its reverse (11111001227), we get a palindrome (83321012338).

The spelling of 72210011111 in words is "seventy-two billion, two hundred ten million, eleven thousand, one hundred eleven".