10111210221 has 64 divisors (see below), whose sum is σ = 16600064000. Its totient is φ = 5457025728.

The previous prime is 10111210199. The next prime is 10111210231. The reversal of 10111210221 is 12201211101.

It is not a de Polignac number, because 10111210221 - 2¹⁴ = 10111193837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10111210197 and 10111210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111210231) 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 63 ways as a sum of consecutive naturals, for example, 9051555 + ... + 9052671.

It is an arithmetic number, because the mean of its divisors is an integer number (259376000).

Almost surely, 2^10111210221 is an apocalyptic number.

It is an amenable number.

10111210221 is a deficient number, since it is larger than the sum of its proper divisors (6488853779).

10111210221 is a wasteful number, since it uses less digits than its factorization.

10111210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623 (or 1609 counting only the distinct ones).

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

Adding to 10111210221 its reverse (12201211101), we get a palindrome (22312421322).

The spelling of 10111210221 in words is "ten billion, one hundred eleven million, two hundred ten thousand, two hundred twenty-one".