20221222021 has 16 divisors (see below), whose sum is σ = 27150173568. Its totient is φ = 14544734400.

The previous prime is 20221221997. The next prime is 20221222037. The reversal of 20221222021 is 12022212202.

It is not a de Polignac number, because 20221222021 - 2⁵ = 20221221989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221221986 and 20221222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221222061) 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 15 ways as a sum of consecutive naturals, for example, 10099510 + ... + 10101511.

It is an arithmetic number, because the mean of its divisors is an integer number (1696885848).

Almost surely, 2^20221222021 is an apocalyptic number.

It is an amenable number.

20221222021 is a deficient number, since it is larger than the sum of its proper divisors (6928951547).

20221222021 is a wasteful number, since it uses less digits than its factorization.

20221222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201052.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20221222021 its reverse (12022212202), we get a palindrome (32243434223).

It can be divided in two parts, 20221 and 222021, that added together give a palindrome (242242).

The spelling of 20221222021 in words is "twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-one".