22012021201 has 4 divisors (see below), whose sum is σ = 22313555812. Its totient is φ = 21710486592.

The previous prime is 22012021193. The next prime is 22012021211. The reversal of 22012021201 is 10212021022.

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 13437446400 + 8574574801 = 115920^2 + 92599^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012021201 - 2³ = 22012021193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22012021211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150767196 + ... + 150767341.

It is an arithmetic number, because the mean of its divisors is an integer number (5578388953).

Almost surely, 2^22012021201 is an apocalyptic number.

It is an amenable number.

22012021201 is a deficient number, since it is larger than the sum of its proper divisors (301534611).

22012021201 is an equidigital number, since it uses as much as digits as its factorization.

22012021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301534610.

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

Adding to 22012021201 its reverse (10212021022), we get a palindrome (32224042223).

The spelling of 22012021201 in words is "twenty-two billion, twelve million, twenty-one thousand, two hundred one".