80212111 has 4 divisors (see below), whose sum is σ = 91670992. Its totient is φ = 68753232.

The previous prime is 80212087. The next prime is 80212123. The reversal of 80212111 is 11121208.

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

It is a cyclic number.

It is not a de Polignac number, because 80212111 - 2¹³ = 80203919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80210111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5729430 + ... + 5729443.

It is an arithmetic number, because the mean of its divisors is an integer number (22917748).

Almost surely, 2^80212111 is an apocalyptic number.

80212111 is a deficient number, since it is larger than the sum of its proper divisors (11458881).

80212111 is a wasteful number, since it uses less digits than its factorization.

80212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11458880.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 80212111 is about 8956.1214261532. The cubic root of 80212111 is about 431.2674180180.

Adding to 80212111 its reverse (11121208), we get a palindrome (91333319).

The spelling of 80212111 in words is "eighty million, two hundred twelve thousand, one hundred eleven".