22201012021 has 4 divisors (see below), whose sum is σ = 22201602444. Its totient is φ = 22200421600.

The previous prime is 22201012013. The next prime is 22201012091. The reversal of 22201012021 is 12021010222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20595407121 + 1605604900 = 143511^2 + 40070^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201012021 - 2³ = 22201012013 is a prime.

It is a super-3 number, since 3×22201012021³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201011992 and 22201012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201012091) 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 3 ways as a sum of consecutive naturals, for example, 234670 + ... + 315391.

It is an arithmetic number, because the mean of its divisors is an integer number (5550400611).

Almost surely, 2^22201012021 is an apocalyptic number.

It is an amenable number.

22201012021 is a deficient number, since it is larger than the sum of its proper divisors (590423).

22201012021 is an equidigital number, since it uses as much as digits as its factorization.

22201012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590422.

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

Adding to 22201012021 its reverse (12021010222), we get a palindrome (34222022243).

The spelling of 22201012021 in words is "twenty-two billion, two hundred one million, twelve thousand, twenty-one".