212122011112111 has 4 divisors (see below), whose sum is σ = 212287861004800. Its totient is φ = 211956161219424.

The previous prime is 212122011112079. The next prime is 212122011112139. The reversal of 212122011112111 is 111211110221212.

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 212122011112111 - 2⁵ = 212122011112079 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 (212122011112171) 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, 82924944426 + ... + 82924946983.

It is an arithmetic number, because the mean of its divisors is an integer number (53071965251200).

Almost surely, 2^{212122011112111} is an apocalyptic number.

212122011112111 is a deficient number, since it is larger than the sum of its proper divisors (165849892689).

212122011112111 is a wasteful number, since it uses less digits than its factorization.

212122011112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165849892688.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 212122011112111 its reverse (111211110221212), we get a palindrome (323333121333323).

The spelling of 212122011112111 in words is "two hundred twelve trillion, one hundred twenty-two billion, eleven million, one hundred twelve thousand, one hundred eleven".