22021012001 has 4 divisors (see below), whose sum is σ = 22021368852. Its totient is φ = 22020655152.

The previous prime is 22021011983. The next prime is 22021012049. The reversal of 22021012001 is 10021012022.

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 8373165025 + 13647846976 = 91505^2 + 116824^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021012001 - 2⁶ = 22021011937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22021017001) 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, 59390 + ... + 218103.

It is an arithmetic number, because the mean of its divisors is an integer number (5505342213).

Almost surely, 2^22021012001 is an apocalyptic number.

It is an amenable number.

22021012001 is a deficient number, since it is larger than the sum of its proper divisors (356851).

22021012001 is an equidigital number, since it uses as much as digits as its factorization.

22021012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356850.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22021012001 its reverse (10021012022), we get a palindrome (32042024023).

The spelling of 22021012001 in words is "twenty-two billion, twenty-one million, twelve thousand, one".