10111100221021 has 4 divisors (see below), whose sum is σ = 10117314789472. Its totient is φ = 10104885652572.

The previous prime is 10111100221009. The next prime is 10111100221037. The reversal of 10111100221021 is 12012200111101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10111100221021 - 2⁹ = 10111100220509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111100220992 and 10111100221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111100221421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3107281785 + ... + 3107285038.

It is an arithmetic number, because the mean of its divisors is an integer number (2529328697368).

Almost surely, 2^{10111100221021} is an apocalyptic number.

It is an amenable number.

10111100221021 is a deficient number, since it is larger than the sum of its proper divisors (6214568451).

10111100221021 is an equidigital number, since it uses as much as digits as its factorization.

10111100221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6214568450.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10111100221021 its reverse (12012200111101), we get a palindrome (22123300332122).

The spelling of 10111100221021 in words is "ten trillion, one hundred eleven billion, one hundred million, two hundred twenty-one thousand, twenty-one".