210221011121212 has 48 divisors (see below), whose sum is σ = 452856762534400. Its totient is φ = 83150939385792.

The previous prime is 210221011121137. The next prime is 210221011121273. The reversal of 210221011121212 is 212121110122012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 210221011121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44326098 + ... + 48838969.

Almost surely, 2^{210221011121212} is an apocalyptic number.

It is an amenable number.

210221011121212 is an abundant number, since it is smaller than the sum of its proper divisors (242635751413188).

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

210221011121212 is a wasteful number, since it uses less digits than its factorization.

210221011121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93171290 (or 93171288 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210221011121212 its reverse (212121110122012), we get a palindrome (422342121243224).

The spelling of 210221011121212 in words is "two hundred ten trillion, two hundred twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred twelve".