212122010011111 has 4 divisors (see below), whose sum is σ = 212887793441032. Its totient is φ = 211356226581192.

The previous prime is 212122010011057. The next prime is 212122010011117. The reversal of 212122010011111 is 111110010221212.

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 212122010011111 - 2⁴³ = 203325916988903 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 (212122010011117) 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, 382891714545 + ... + 382891715098.

It is an arithmetic number, because the mean of its divisors is an integer number (53221948360258).

Almost surely, 2^{212122010011111} is an apocalyptic number.

212122010011111 is a deficient number, since it is larger than the sum of its proper divisors (765783429921).

212122010011111 is an equidigital number, since it uses as much as digits as its factorization.

212122010011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765783429920.

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

Adding to 212122010011111 its reverse (111110010221212), we get a palindrome (323232020232323).

The spelling of 212122010011111 in words is "two hundred twelve trillion, one hundred twenty-two billion, ten million, eleven thousand, one hundred eleven".