22120021021 has 8 divisors (see below), whose sum is σ = 25286466944. Its totient is φ = 18955185840.

The previous prime is 22120021013. The next prime is 22120021031. The reversal of 22120021021 is 12012002122.

It is a happy number.

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 22120021021 - 2³ = 22120021013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120020992 and 22120021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120021031) 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, 373110 + ... + 428311.

It is an arithmetic number, because the mean of its divisors is an integer number (3160808368).

Almost surely, 2^22120021021 is an apocalyptic number.

It is an amenable number.

22120021021 is a deficient number, since it is larger than the sum of its proper divisors (3166445923).

22120021021 is an equidigital number, since it uses as much as digits as its factorization.

22120021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805371.

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

Adding to 22120021021 its reverse (12012002122), we get a palindrome (34132023143).

The spelling of 22120021021 in words is "twenty-two billion, one hundred twenty million, twenty-one thousand, twenty-one".