10101111100221 has 4 divisors (see below), whose sum is σ = 13468148133632. Its totient is φ = 6734074066812.

The previous prime is 10101111100219. The next prime is 10101111100231. The reversal of 10101111100221 is 12200111110101.

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 10101111100221 - 2¹ = 10101111100219 is a prime.

It is a super-2 number, since 2×10101111100221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101111100197 and 10101111100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101111100231) 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, 1683518516701 + ... + 1683518516706.

It is an arithmetic number, because the mean of its divisors is an integer number (3367037033408).

Almost surely, 2^{10101111100221} is an apocalyptic number.

It is an amenable number.

10101111100221 is a deficient number, since it is larger than the sum of its proper divisors (3367037033411).

10101111100221 is an equidigital number, since it uses as much as digits as its factorization.

10101111100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367037033410.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 10101111100221 its reverse (12200111110101), we get a palindrome (22301222210322).

The spelling of 10101111100221 in words is "ten trillion, one hundred one billion, one hundred eleven million, one hundred thousand, two hundred twenty-one".