22012221001 has 4 divisors (see below), whose sum is σ = 22969274112. Its totient is φ = 21055167892.

The previous prime is 22012220983. The next prime is 22012221013. The reversal of 22012221001 is 10012221022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22012221001 - 2⁷ = 22012220873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22012221701) 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, 478526521 + ... + 478526566.

It is an arithmetic number, because the mean of its divisors is an integer number (5742318528).

Almost surely, 2^22012221001 is an apocalyptic number.

It is an amenable number.

22012221001 is a deficient number, since it is larger than the sum of its proper divisors (957053111).

22012221001 is an equidigital number, since it uses as much as digits as its factorization.

22012221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957053110.

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

Adding to 22012221001 its reverse (10012221022), we get a palindrome (32024442023).

The spelling of 22012221001 in words is "twenty-two billion, twelve million, two hundred twenty-one thousand, one".