212211121201212 has 72 divisors (see below), whose sum is σ = 576388975244544. Its totient is φ = 60590974119648.

The previous prime is 212211121201199. The next prime is 212211121201297. The reversal of 212211121201212 is 212102121112212.

It is a super-2 number, since 2×212211121201212² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120478458 + ... + 122227169.

It is an arithmetic number, because the mean of its divisors is an integer number (8005402433952).

Almost surely, 2^{212211121201212} is an apocalyptic number.

It is an amenable number.

212211121201212 is an abundant number, since it is smaller than the sum of its proper divisors (364177854043332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212211121201212 is a wasteful number, since it uses less digits than its factorization.

212211121201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242707135 (or 242707126 counting only the distinct ones).

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

Adding to 212211121201212 its reverse (212102121112212), we get a palindrome (424313242313424).

The spelling of 212211121201212 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred twenty-one million, two hundred one thousand, two hundred twelve".