22021011021 has 8 divisors (see below), whose sum is σ = 29364005440. Its totient is φ = 14679345312.

The previous prime is 22021011017. The next prime is 22021011073. The reversal of 22021011021 is 12011012022.

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

It is not a de Polignac number, because 22021011021 - 2² = 22021011017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021010988 and 22021011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292840 + ... + 360273.

It is an arithmetic number, because the mean of its divisors is an integer number (3670500680).

Almost surely, 2^22021011021 is an apocalyptic number.

It is an amenable number.

22021011021 is a deficient number, since it is larger than the sum of its proper divisors (7342994419).

22021011021 is a wasteful number, since it uses less digits than its factorization.

22021011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664355.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22021011021 its reverse (12011012022), we get a palindrome (34032023043).

The spelling of 22021011021 in words is "twenty-two billion, twenty-one million, eleven thousand, twenty-one".