10221212212 has 6 divisors (see below), whose sum is σ = 17887121378. Its totient is φ = 5110606104.

The previous prime is 10221212189. The next prime is 10221212249. The reversal of 10221212212 is 21221212201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9047053456 + 1174158756 = 95116^2 + 34266^2 .

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, 1277651523 + ... + 1277651530.

Almost surely, 2^10221212212 is an apocalyptic number.

It is an amenable number.

10221212212 is a deficient number, since it is larger than the sum of its proper divisors (7665909166).

10221212212 is a wasteful number, since it uses less digits than its factorization.

10221212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555303057 (or 2555303055 counting only the distinct ones).

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

Adding to 10221212212 its reverse (21221212201), we get a palindrome (31442424413).

The spelling of 10221212212 in words is "ten billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".