212212121121012 has 48 divisors (see below), whose sum is σ = 505284115621824. Its totient is φ = 69300542400000.

The previous prime is 212212121121001. The next prime is 212212121121023. The reversal of 212212121121012 is 210121121212212.

It is an interprime number because it is at equal distance from previous prime (212212121121001) and next prime (212212121121023).

It is a self number, because there is not a number n which added to its sum of digits gives 212212121121012.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 577320789 + ... + 577688252.

It is an arithmetic number, because the mean of its divisors is an integer number (10526752408788).

Almost surely, 2^{212212121121012} is an apocalyptic number.

It is an amenable number.

212212121121012 is an abundant number, since it is smaller than the sum of its proper divisors (293071994500812).

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

212212121121012 is a wasteful number, since it uses less digits than its factorization.

212212121121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155009360 (or 1155009358 counting only the distinct ones).

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

Adding to 212212121121012 its reverse (210121121212212), we get a palindrome (422333242333224).

The spelling of 212212121121012 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, twelve".