11011221102021 has 16 divisors (see below), whose sum is σ = 17136003661824. Its totient is φ = 6158251314864.

The previous prime is 11011221101983. The next prime is 11011221102023. The reversal of 11011221102021 is 12020112211011.

It is a happy number.

It is not a de Polignac number, because 11011221102021 - 2¹⁴ = 11011221085637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011221102023) 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, 5578125205 + ... + 5578127178.

It is an arithmetic number, because the mean of its divisors is an integer number (1071000228864).

Almost surely, 2^{11011221102021} is an apocalyptic number.

It is an amenable number.

11011221102021 is a deficient number, since it is larger than the sum of its proper divisors (6124782559803).

11011221102021 is a wasteful number, since it uses less digits than its factorization.

11011221102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11156252440.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11011221102021 its reverse (12020112211011), we get a palindrome (23031333313032).

The spelling of 11011221102021 in words is "eleven trillion, eleven billion, two hundred twenty-one million, one hundred two thousand, twenty-one".