11011001101221 has 12 divisors (see below), whose sum is σ = 16137334947776. Its totient is φ = 6673334000520.

The previous prime is 11011001101201. The next prime is 11011001101253. The reversal of 11011001101221 is 12210110011011.

11011001101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11011001101221 - 2¹⁸ = 11011000839077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011001101197 and 11011001101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011001101201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15166667821 + ... + 15166668546.

Almost surely, 2^{11011001101221} is an apocalyptic number.

11011001101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11011001101221 is a deficient number, since it is larger than the sum of its proper divisors (5126333846555).

11011001101221 is a wasteful number, since it uses less digits than its factorization.

11011001101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30333336392 (or 30333336381 counting only the distinct ones).

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

Adding to 11011001101221 its reverse (12210110011011), we get a palindrome (23221111112232).

The spelling of 11011001101221 in words is "eleven trillion, eleven billion, one million, one hundred one thousand, two hundred twenty-one".