212121200012212 has 6 divisors (see below), whose sum is σ = 371212100021378. Its totient is φ = 106060600006104.

The previous prime is 212121200012201. The next prime is 212121200012251. The reversal of 212121200012212 is 212210002121212.

It can be written as a sum of positive squares in only one way, i.e., 118759342200976 + 93361857811236 = 10897676^2 + 9662394^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212121200012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26515150001523 + ... + 26515150001530.

Almost surely, 2^{212121200012212} is an apocalyptic number.

It is an amenable number.

212121200012212 is a deficient number, since it is larger than the sum of its proper divisors (159090900009166).

212121200012212 is a wasteful number, since it uses less digits than its factorization.

212121200012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53030300003057 (or 53030300003055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212121200012212 its reverse (212210002121212), we get a palindrome (424331202133424).

The spelling of 212121200012212 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred million, twelve thousand, two hundred twelve".