11100101011221 has 16 divisors (see below), whose sum is σ = 15257933564544. Its totient is φ = 7172688826944.

The previous prime is 11100101011211. The next prime is 11100101011229. The reversal of 11100101011221 is 12211010100111.

It is a de Polignac number, because none of the positive numbers 2^k-11100101011221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11100101011197 and 11100101011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100101011229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190086606 + ... + 190144991.

It is an arithmetic number, because the mean of its divisors is an integer number (953620847784).

Almost surely, 2^{11100101011221} is an apocalyptic number.

It is an amenable number.

11100101011221 is a deficient number, since it is larger than the sum of its proper divisors (4157832553323).

11100101011221 is a wasteful number, since it uses less digits than its factorization.

11100101011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380231900.

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

Adding to 11100101011221 its reverse (12211010100111), we get a palindrome (23311111111332).

The spelling of 11100101011221 in words is "eleven trillion, one hundred billion, one hundred one million, eleven thousand, two hundred twenty-one".