212021121222212 has 6 divisors (see below), whose sum is σ = 371036962138878. Its totient is φ = 106010560611104.

The previous prime is 212021121222151. The next prime is 212021121222217. The reversal of 212021121222212 is 212222121120212.

It can be written as a sum of positive squares in only one way, i.e., 134937356992516 + 77083764229696 = 11616254^2 + 8779736^2 .

It is not an unprimeable number, because it can be changed into a prime (212021121222217) 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 as a sum of consecutive naturals, namely, 26502640152773 + ... + 26502640152780.

It is an arithmetic number, because the mean of its divisors is an integer number (61839493689813).

Almost surely, 2^{212021121222212} is an apocalyptic number.

It is an amenable number.

212021121222212 is a deficient number, since it is larger than the sum of its proper divisors (159015840916666).

212021121222212 is a wasteful number, since it uses less digits than its factorization.

212021121222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53005280305557 (or 53005280305555 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 212021121222212 its reverse (212222121120212), we get a palindrome (424243242342424).

The spelling of 212021121222212 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".