11212020011111 has 4 divisors (see below), whose sum is σ = 11268933818472. Its totient is φ = 11155106203752.

The previous prime is 11212020011089. The next prime is 11212020011123. The reversal of 11212020011111 is 11111002021211.

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 11212020011111 - 2²⁶ = 11211952902247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212020011411) 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 3 ways as a sum of consecutive naturals, for example, 28456903385 + ... + 28456903778.

It is an arithmetic number, because the mean of its divisors is an integer number (2817233454618).

Almost surely, 2^{11212020011111} is an apocalyptic number.

11212020011111 is a deficient number, since it is larger than the sum of its proper divisors (56913807361).

11212020011111 is an equidigital number, since it uses as much as digits as its factorization.

11212020011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56913807360.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11212020011111 its reverse (11111002021211), we get a palindrome (22323022032322).

The spelling of 11212020011111 in words is "eleven trillion, two hundred twelve billion, twenty million, eleven thousand, one hundred eleven".