11101001010221 has 4 divisors (see below), whose sum is σ = 11101014353472. Its totient is φ = 11100987666972.

The previous prime is 11101001010199. The next prime is 11101001010223. The reversal of 11101001010221 is 12201010010111.

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 a de Polignac number, because none of the positive numbers 2^k-11101001010221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101001010223) 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, 5334341 + ... + 7117386.

It is an arithmetic number, because the mean of its divisors is an integer number (2775253588368).

Almost surely, 2^{11101001010221} is an apocalyptic number.

It is an amenable number.

11101001010221 is a deficient number, since it is larger than the sum of its proper divisors (13343251).

11101001010221 is an equidigital number, since it uses as much as digits as its factorization.

11101001010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13343250.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11101001010221 its reverse (12201010010111), we get a palindrome (23302011020332).

The spelling of 11101001010221 in words is "eleven trillion, one hundred one billion, one million, ten thousand, two hundred twenty-one".