22222021021 has 8 divisors (see below), whose sum is σ = 23357456064. Its totient is φ = 21100691040.

The previous prime is 22222021013. The next prime is 22222021037. The reversal of 22222021021 is 12012022222.

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

It is a cyclic number.

It is not a de Polignac number, because 22222021021 - 2³ = 22222021013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22222020986 and 22222021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222021001) 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, 3523035 + ... + 3529336.

It is an arithmetic number, because the mean of its divisors is an integer number (2919682008).

Almost surely, 2^22222021021 is an apocalyptic number.

It is an amenable number.

22222021021 is a deficient number, since it is larger than the sum of its proper divisors (1135435043).

22222021021 is a wasteful number, since it uses less digits than its factorization.

22222021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052531.

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

Adding to 22222021021 its reverse (12012022222), we get a palindrome (34234043243).

The spelling of 22222021021 in words is "twenty-two billion, two hundred twenty-two million, twenty-one thousand, twenty-one".