11020220021 has 8 divisors (see below), whose sum is σ = 11087322624. Its totient is φ = 10953275760.

The previous prime is 11020219997. The next prime is 11020220047. The reversal of 11020220021 is 12002202011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11020220021 is a prime.

It is a super-2 number, since 2×11020220021² (a number of 21 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 = 11020219984 and 11020220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020220821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101555 + ... + 179871.

It is an arithmetic number, because the mean of its divisors is an integer number (1385915328).

Almost surely, 2^11020220021 is an apocalyptic number.

It is an amenable number.

11020220021 is a deficient number, since it is larger than the sum of its proper divisors (67102603).

11020220021 is an equidigital number, since it uses as much as digits as its factorization.

11020220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79171.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11020220021 its reverse (12002202011), we get a palindrome (23022422032).

The spelling of 11020220021 in words is "eleven billion, twenty million, two hundred twenty thousand, twenty-one".