101221220212 has 36 divisors (see below), whose sum is σ = 212704512384. Its totient is φ = 41981148720.

The previous prime is 101221220207. The next prime is 101221220213. The reversal of 101221220212 is 212022122101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8323518 + ... + 8335669.

Almost surely, 2^101221220212 is an apocalyptic number.

It is an amenable number.

101221220212 is an abundant number, since it is smaller than the sum of its proper divisors (111483292172).

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

101221220212 is a wasteful number, since it uses less digits than its factorization.

101221220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16659236 (or 16659227 counting only the distinct ones).

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

Adding to 101221220212 its reverse (212022122101), we get a palindrome (313243342313).

The spelling of 101221220212 in words is "one hundred one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twelve".