22022021021 has 16 divisors (see below), whose sum is σ = 29568029568. Its totient is φ = 15840014400.

The previous prime is 22022021011. The next prime is 22022021029. The reversal of 22022021021 is 12012022022.

It is a de Polignac number, because none of the positive numbers 2^k-22022021021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22022020987 and 22022021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022021029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10999010 + ... + 11001011.

It is an arithmetic number, because the mean of its divisors is an integer number (1848001848).

Almost surely, 2^22022021021 is an apocalyptic number.

It is an amenable number.

22022021021 is a deficient number, since it is larger than the sum of its proper divisors (7546008547).

22022021021 is a wasteful number, since it uses less digits than its factorization.

22022021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22000052.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22022021021 its reverse (12012022022), we get a palindrome (34034043043).

The spelling of 22022021021 in words is "twenty-two billion, twenty-two million, twenty-one thousand, twenty-one".