10100221221 has 4 divisors (see below), whose sum is σ = 13466961632. Its totient is φ = 6733480812.

The previous prime is 10100221211. The next prime is 10100221247. The reversal of 10100221221 is 12212200101.

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 not a de Polignac number, because 10100221221 - 2⁷ = 10100221093 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 = 10100221197 and 10100221206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683370201 + ... + 1683370206.

It is an arithmetic number, because the mean of its divisors is an integer number (3366740408).

Almost surely, 2^10100221221 is an apocalyptic number.

It is an amenable number.

10100221221 is a deficient number, since it is larger than the sum of its proper divisors (3366740411).

10100221221 is an equidigital number, since it uses as much as digits as its factorization.

10100221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366740410.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10100221221 its reverse (12212200101), we get a palindrome (22312421322).

The spelling of 10100221221 in words is "ten billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-one".