212001122020111 has 4 divisors (see below), whose sum is σ = 212001162634800. Its totient is φ = 212001081405424.

The previous prime is 212001122020091. The next prime is 212001122020141. The reversal of 212001122020111 is 111020221100212.

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 212001122020111 - 2⁴³ = 203205028997903 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 (212001122020141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11080051 + ... + 23383108.

It is an arithmetic number, because the mean of its divisors is an integer number (53000290658700).

Almost surely, 2^{212001122020111} is an apocalyptic number.

212001122020111 is a deficient number, since it is larger than the sum of its proper divisors (40614689).

212001122020111 is an equidigital number, since it uses as much as digits as its factorization.

212001122020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40614688.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212001122020111 its reverse (111020221100212), we get a palindrome (323021343120323).

The spelling of 212001122020111 in words is "two hundred twelve trillion, one billion, one hundred twenty-two million, twenty thousand, one hundred eleven".