11110211220021 has 32 divisors (see below), whose sum is σ = 14926204108800. Its totient is φ = 7350715585920.

The previous prime is 11110211220019. The next prime is 11110211220047. The reversal of 11110211220021 is 12002211201111.

It is a happy number.

It is not a de Polignac number, because 11110211220021 - 2¹ = 11110211220019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110211220821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447817465 + ... + 447842273.

It is an arithmetic number, because the mean of its divisors is an integer number (466443878400).

Almost surely, 2^{11110211220021} is an apocalyptic number.

It is an amenable number.

11110211220021 is a deficient number, since it is larger than the sum of its proper divisors (3815992888779).

11110211220021 is a wasteful number, since it uses less digits than its factorization.

11110211220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26809.

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

Adding to 11110211220021 its reverse (12002211201111), we get a palindrome (23112422421132).

The spelling of 11110211220021 in words is "eleven trillion, one hundred ten billion, two hundred eleven million, two hundred twenty thousand, twenty-one".