72211123 has 2 divisors, whose sum is σ = 72211124. Its totient is φ = 72211122.

The previous prime is 72211093. The next prime is 72211169. The reversal of 72211123 is 32111227.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72211123 is a prime.

It is a super-2 number, since 2×72211123² = 10428892569842258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72211123.

It is not a weakly prime, because it can be changed into another prime (72211423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36105561 + 36105562.

It is an arithmetic number, because the mean of its divisors is an integer number (36105562).

Almost surely, 2^72211123 is an apocalyptic number.

72211123 is a deficient number, since it is larger than the sum of its proper divisors (1).

72211123 is an equidigital number, since it uses as much as digits as its factorization.

72211123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 19.

The square root of 72211123 is about 8497.7128099272. The cubic root of 72211123 is about 416.4229914593.

The spelling of 72211123 in words is "seventy-two million, two hundred eleven thousand, one hundred twenty-three".