212011001021111 has 4 divisors (see below), whose sum is σ = 224482236375312. Its totient is φ = 199539765666912.

The previous prime is 212011001021101. The next prime is 212011001021123. The reversal of 212011001021111 is 111120100110212.

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 212011001021111 - 2¹⁸ = 212011000758967 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 (212011001021101) 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, 6235617677075 + ... + 6235617677108.

It is an arithmetic number, because the mean of its divisors is an integer number (56120559093828).

Almost surely, 2^{212011001021111} is an apocalyptic number.

212011001021111 is a deficient number, since it is larger than the sum of its proper divisors (12471235354201).

212011001021111 is a wasteful number, since it uses less digits than its factorization.

212011001021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471235354200.

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

Adding to 212011001021111 its reverse (111120100110212), we get a palindrome (323131101131323).

The spelling of 212011001021111 in words is "two hundred twelve trillion, eleven billion, one million, twenty-one thousand, one hundred eleven".