210121022000212 has 6 divisors (see below), whose sum is σ = 367711788500378. Its totient is φ = 105060511000104.

The previous prime is 210121022000209. The next prime is 210121022000213. The reversal of 210121022000212 is 212000220121012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 210031570761156 + 89451239056 = 14492466^2 + 299084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121022000213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26265127750023 + ... + 26265127750030.

Almost surely, 2^{210121022000212} is an apocalyptic number.

It is an amenable number.

210121022000212 is a deficient number, since it is larger than the sum of its proper divisors (157590766500166).

210121022000212 is a wasteful number, since it uses less digits than its factorization.

210121022000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52530255500057 (or 52530255500055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210121022000212 its reverse (212000220121012), we get a palindrome (422121242121224).

The spelling of 210121022000212 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-two million, two hundred twelve", and thus it is an aban number.