210021200212 has 6 divisors (see below), whose sum is σ = 367537100378. Its totient is φ = 105010600104.

The previous prime is 210021200209. The next prime is 210021200219. The reversal of 210021200212 is 212002120012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 168529954576 + 41491245636 = 410524^2 + 203694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210021200192 and 210021200201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021200219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26252650023 + ... + 26252650030.

Almost surely, 2^210021200212 is an apocalyptic number.

It is an amenable number.

210021200212 is a deficient number, since it is larger than the sum of its proper divisors (157515900166).

210021200212 is a wasteful number, since it uses less digits than its factorization.

210021200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52505300057 (or 52505300055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210021200212 its reverse (212002120012), we get a palindrome (422023320224).

The spelling of 210021200212 in words is "two hundred ten billion, twenty-one million, two hundred thousand, two hundred twelve".