212012221211211 has 32 divisors (see below), whose sum is σ = 295044718694400. Its totient is φ = 135163573294464.

The previous prime is 212012221211143. The next prime is 212012221211233. The reversal of 212012221211211 is 112112122210212.

It is not a de Polignac number, because 212012221211211 - 2¹³ = 212012221203019 is a prime.

It is a super-2 number, since 2×212012221211211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212012221211711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6440795925 + ... + 6440828841.

It is an arithmetic number, because the mean of its divisors is an integer number (9220147459200).

Almost surely, 2^{212012221211211} is an apocalyptic number.

212012221211211 is a deficient number, since it is larger than the sum of its proper divisors (83032497483189).

212012221211211 is a wasteful number, since it uses less digits than its factorization.

212012221211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52635.

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

Adding to 212012221211211 its reverse (112112122210212), we get a palindrome (324124343421423).

Subtracting from 212012221211211 its reverse (112112122210212), we obtain a palindrome (99900099000999).

The spelling of 212012221211211 in words is "two hundred twelve trillion, twelve billion, two hundred twenty-one million, two hundred eleven thousand, two hundred eleven".