212012102121111 has 12 divisors (see below), whose sum is σ = 309680598605040. Its totient is φ = 139753295779680.

The previous prime is 212012102121101. The next prime is 212012102121133. The reversal of 212012102121111 is 111121201210212.

It is a happy number.

212012102121111 is a `hidden beast` number, since 21 + 201 + 210 + 2 + 121 + 111 = 666.

It is not a de Polignac number, because 212012102121111 - 2¹⁵ = 212012102088343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012102121101) 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 11 ways as a sum of consecutive naturals, for example, 132342135355 + ... + 132342136956.

It is an arithmetic number, because the mean of its divisors is an integer number (25806716550420).

Almost surely, 2^{212012102121111} is an apocalyptic number.

212012102121111 is a deficient number, since it is larger than the sum of its proper divisors (97668496483929).

212012102121111 is a wasteful number, since it uses less digits than its factorization.

212012102121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264684272406 (or 264684272403 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212012102121111 its reverse (111121201210212), we get a palindrome (323133303331323).

It can be divided in two parts, 21201210212 and 1111, that multiplied together give a palindrome (23554544545532).

The spelling of 212012102121111 in words is "two hundred twelve trillion, twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred eleven".