11020221220021 has 16 divisors (see below), whose sum is σ = 12493177782400. Its totient is φ = 9636638776128.

The previous prime is 11020221219971. The next prime is 11020221220039. The reversal of 11020221220021 is 12002212202011.

It is a happy number.

It is not a de Polignac number, because 11020221220021 - 2⁷ = 11020221219893 is a prime.

It is a super-2 number, since 2×11020221220021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020221219977 and 11020221220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020221220061) 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, 3932935 + ... + 6124411.

It is an arithmetic number, because the mean of its divisors is an integer number (780823611400).

Almost surely, 2^{11020221220021} is an apocalyptic number.

It is an amenable number.

11020221220021 is a deficient number, since it is larger than the sum of its proper divisors (1472956562379).

11020221220021 is a wasteful number, since it uses less digits than its factorization.

11020221220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211868.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11020221220021 its reverse (12002212202011), we get a palindrome (23022433422032).

The spelling of 11020221220021 in words is "eleven trillion, twenty billion, two hundred twenty-one million, two hundred twenty thousand, twenty-one".