22202221001 has 4 divisors (see below), whose sum is σ = 22206504900. Its totient is φ = 22197937104.

The previous prime is 22202220991. The next prime is 22202221039. The reversal of 22202221001 is 10012220222.

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 18110699776 + 4091521225 = 134576^2 + 63965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22202221001 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 (22202221061) 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, 2134166 + ... + 2144543.

It is an arithmetic number, because the mean of its divisors is an integer number (5551626225).

Almost surely, 2^22202221001 is an apocalyptic number.

It is an amenable number.

22202221001 is a deficient number, since it is larger than the sum of its proper divisors (4283899).

22202221001 is an equidigital number, since it uses as much as digits as its factorization.

22202221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283898.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22202221001 its reverse (10012220222), we get a palindrome (32214441223).

It can be divided in two parts, 2220222 and 1001, that multiplied together give a palindrome (2222442222).

The spelling of 22202221001 in words is "twenty-two billion, two hundred two million, two hundred twenty-one thousand, one".