20212211011111 has 16 divisors (see below), whose sum is σ = 23278259422720. Its totient is φ = 17191108677600.

The previous prime is 20212211011103. The next prime is 20212211011133. The reversal of 20212211011111 is 11111011221202.

It is a cyclic number.

It is not a de Polignac number, because 20212211011111 - 2³ = 20212211011103 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 (20212211011171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11631315 + ... + 13255636.

It is an arithmetic number, because the mean of its divisors is an integer number (1454891213920).

Almost surely, 2^{20212211011111} is an apocalyptic number.

20212211011111 is a deficient number, since it is larger than the sum of its proper divisors (3066048411609).

20212211011111 is a wasteful number, since it uses less digits than its factorization.

20212211011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24887854.

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

Adding to 20212211011111 its reverse (11111011221202), we get a palindrome (31323222232313).

The spelling of 20212211011111 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, eleven thousand, one hundred eleven".