10111201221 has 8 divisors (see below), whose sum is σ = 14707201824. Its totient is φ = 6128000720.

The previous prime is 10111201213. The next prime is 10111201223. The reversal of 10111201221 is 12210211101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10111201221 - 2³ = 10111201213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111201197 and 10111201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111201223) 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 7 ways as a sum of consecutive naturals, for example, 153199986 + ... + 153200051.

It is an arithmetic number, because the mean of its divisors is an integer number (1838400228).

Almost surely, 2^10111201221 is an apocalyptic number.

10111201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10111201221 is a deficient number, since it is larger than the sum of its proper divisors (4596000603).

10111201221 is a wasteful number, since it uses less digits than its factorization.

10111201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306400051.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10111201221 its reverse (12210211101), we get a palindrome (22321412322).

The spelling of 10111201221 in words is "ten billion, one hundred eleven million, two hundred one thousand, two hundred twenty-one".