101111221221212 has 6 divisors (see below), whose sum is σ = 176944637137128. Its totient is φ = 50555610610604.

The previous prime is 101111221221193. The next prime is 101111221221253. The reversal of 101111221221212 is 212122122111101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12638902652648 + ... + 12638902652655.

It is an arithmetic number, because the mean of its divisors is an integer number (29490772856188).

Almost surely, 2^{101111221221212} is an apocalyptic number.

It is an amenable number.

101111221221212 is a deficient number, since it is larger than the sum of its proper divisors (75833415915916).

101111221221212 is a wasteful number, since it uses less digits than its factorization.

101111221221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25277805305307 (or 25277805305305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 101111221221212 its reverse (212122122111101), we get a palindrome (313233343332313).

The spelling of 101111221221212 in words is "one hundred one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".