22220011001 has 4 divisors (see below), whose sum is σ = 22220674404. Its totient is φ = 22219347600.

The previous prime is 22220010961. The next prime is 22220011003. The reversal of 22220011001 is 10011002222.

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 14312533225 + 7907477776 = 119635^2 + 88924^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220011001 - 2⁶ = 22220010937 is a prime.

It is a super-2 number, since 2×22220011001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220011003) 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, 278630 + ... + 349391.

It is an arithmetic number, because the mean of its divisors is an integer number (5555168601).

Almost surely, 2^22220011001 is an apocalyptic number.

It is an amenable number.

22220011001 is a deficient number, since it is larger than the sum of its proper divisors (663403).

22220011001 is an equidigital number, since it uses as much as digits as its factorization.

22220011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663402.

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

Adding to 22220011001 its reverse (10011002222), we get a palindrome (32231013223).

The spelling of 22220011001 in words is "twenty-two billion, two hundred twenty million, eleven thousand, one".