212021111220012 has 36 divisors (see below), whose sum is σ = 536294152550520. Its totient is φ = 70627299451392.

The previous prime is 212021111220011. The next prime is 212021111220013. The reversal of 212021111220012 is 210022111120212.

212021111220012 is a `hidden beast` number, since 212 + 0 + 211 + 11 + 220 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (212021111220011) and next prime (212021111220013).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (212021111220011) 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 11 ways as a sum of consecutive naturals, for example, 1933456437 + ... + 1933566092.

It is an arithmetic number, because the mean of its divisors is an integer number (14897059793070).

Almost surely, 2^{212021111220012} is an apocalyptic number.

It is an amenable number.

212021111220012 is an abundant number, since it is smaller than the sum of its proper divisors (324273041330508).

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

212021111220012 is a wasteful number, since it uses less digits than its factorization.

212021111220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867024062 (or 3867024057 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212021111220012 its reverse (210022111120212), we get a palindrome (422043222340224).

The spelling of 212021111220012 in words is "two hundred twelve trillion, twenty-one billion, one hundred eleven million, two hundred twenty thousand, twelve".