22011221001 has 64 divisors (see below), whose sum is σ = 36924825600. Its totient is φ = 11330323200.

The previous prime is 22011220999. The next prime is 22011221017. The reversal of 22011221001 is 10012211022.

It is not a de Polignac number, because 22011221001 - 2¹ = 22011220999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22011221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12641991 + ... + 12643731.

It is an arithmetic number, because the mean of its divisors is an integer number (576950400).

Almost surely, 2^22011221001 is an apocalyptic number.

22011221001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22011221001 is a deficient number, since it is larger than the sum of its proper divisors (14913604599).

22011221001 is a wasteful number, since it uses less digits than its factorization.

22011221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22011221001 its reverse (10012211022), we get a palindrome (32023432023).

The spelling of 22011221001 in words is "twenty-two billion, eleven million, two hundred twenty-one thousand, one".