210221222012 has 24 divisors (see below), whose sum is σ = 389544896160. Its totient is φ = 98923230720.

The previous prime is 210221221997. The next prime is 210221222089. The reversal of 210221222012 is 210222122012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1868312 + ... + 1977632.

It is an arithmetic number, because the mean of its divisors is an integer number (16231037340).

Almost surely, 2^210221222012 is an apocalyptic number.

It is an amenable number.

210221222012 is a deficient number, since it is larger than the sum of its proper divisors (179323674148).

210221222012 is a wasteful number, since it uses less digits than its factorization.

210221222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137621 (or 137619 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210221222012 its reverse (210222122012), we get a palindrome (420443344024).

The spelling of 210221222012 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty-two thousand, twelve".