212212012221111 has 16 divisors (see below), whose sum is σ = 329472018975744. Its totient is φ = 118976006851104.

The previous prime is 212212012221049. The next prime is 212212012221113. The reversal of 212212012221111 is 111122210212212.

It is not a de Polignac number, because 212212012221111 - 2⁶ = 212212012221047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212012221113) 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, 95333337711 + ... + 95333339936.

It is an arithmetic number, because the mean of its divisors is an integer number (20592001185984).

Almost surely, 2^{212212012221111} is an apocalyptic number.

212212012221111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212212012221111 is a deficient number, since it is larger than the sum of its proper divisors (117260006754633).

212212012221111 is a wasteful number, since it uses less digits than its factorization.

212212012221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190666677710.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212212012221111 its reverse (111122210212212), we get a palindrome (323334222433323).

The spelling of 212212012221111 in words is "two hundred twelve trillion, two hundred twelve billion, twelve million, two hundred twenty-one thousand, one hundred eleven".