20220221011 has 4 divisors (see below), whose sum is σ = 20281309624. Its totient is φ = 20159132400.

The previous prime is 20220221009. The next prime is 20220221023. The reversal of 20220221011 is 11012202202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20220221011 - 2¹ = 20220221009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220220982 and 20220221000.

It is not an unprimeable number, because it can be changed into a prime (20220221041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30543810 + ... + 30544471.

It is an arithmetic number, because the mean of its divisors is an integer number (5070327406).

Almost surely, 2^20220221011 is an apocalyptic number.

20220221011 is a deficient number, since it is larger than the sum of its proper divisors (61088613).

20220221011 is an equidigital number, since it uses as much as digits as its factorization.

20220221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61088612.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20220221011 its reverse (11012202202), we get a palindrome (31232423213).

The spelling of 20220221011 in words is "twenty billion, two hundred twenty million, two hundred twenty-one thousand, eleven".