28901111111011 has 2 divisors, whose sum is σ = 28901111111012. Its totient is φ = 28901111111010.

The previous prime is 28901111111003. The next prime is 28901111111029. The reversal of 28901111111011 is 11011111110982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28901111111011 - 2³ = 28901111111003 is a prime.

It is not a weakly prime, because it can be changed into another prime (28901111111611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14450555555505 + 14450555555506.

It is an arithmetic number, because the mean of its divisors is an integer number (14450555555506).

Almost surely, 2^{28901111111011} is an apocalyptic number.

28901111111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28901111111011 is an equidigital number, since it uses as much as digits as its factorization.

28901111111011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 28.

Adding to 28901111111011 its reverse (11011111110982), we get a palindrome (39912222221993).

The spelling of 28901111111011 in words is "twenty-eight trillion, nine hundred one billion, one hundred eleven million, one hundred eleven thousand, eleven".