212111122022111 has 16 divisors (see below), whose sum is σ = 228776555611968. Its totient is φ = 195495582585600.

The previous prime is 212111122022083. The next prime is 212111122022123. The reversal of 212111122022111 is 111220221111212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212111122022111 is a prime.

It is a super-2 number, since 2×212111122022111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111122022141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682824950 + ... + 683135516.

It is an arithmetic number, because the mean of its divisors is an integer number (14298534725748).

Almost surely, 2^{212111122022111} is an apocalyptic number.

212111122022111 is a deficient number, since it is larger than the sum of its proper divisors (16665433589857).

212111122022111 is a wasteful number, since it uses less digits than its factorization.

212111122022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390722.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212111122022111 its reverse (111220221111212), we get a palindrome (323331343133323).

The spelling of 212111122022111 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred twenty-two million, twenty-two thousand, one hundred eleven".