11100100101221 has 8 divisors (see below), whose sum is σ = 11186844894720. Its totient is φ = 11013662369808.

The previous prime is 11100100101193. The next prime is 11100100101239. The reversal of 11100100101221 is 12210100100111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11100100101221 - 2⁶ = 11100100101157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100100101271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76692941 + ... + 76837538.

It is an arithmetic number, because the mean of its divisors is an integer number (1398355611840).

Almost surely, 2^{11100100101221} is an apocalyptic number.

It is an amenable number.

11100100101221 is a deficient number, since it is larger than the sum of its proper divisors (86744793499).

11100100101221 is a wasteful number, since it uses less digits than its factorization.

11100100101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153531043.

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

Adding to 11100100101221 its reverse (12210100100111), we get a palindrome (23310200201332).

The spelling of 11100100101221 in words is "eleven trillion, one hundred billion, one hundred million, one hundred one thousand, two hundred twenty-one".