221122100212 has 24 divisors (see below), whose sum is σ = 417847387496. Its totient is φ = 101782735488.

The previous prime is 221122100197. The next prime is 221122100249. The reversal of 221122100212 is 212001221122.

It is a happy number.

221122100212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6386247396 + 214735852816 = 79914^2 + 463396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5680803 + ... + 5719594.

Almost surely, 2^221122100212 is an apocalyptic number.

It is an amenable number.

221122100212 is a deficient number, since it is larger than the sum of its proper divisors (196725287284).

221122100212 is a wasteful number, since it uses less digits than its factorization.

221122100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11400787 (or 11400785 counting only the distinct ones).

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

Adding to 221122100212 its reverse (212001221122), we get a palindrome (433123321334).

The spelling of 221122100212 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, two hundred twelve".