22021121001 has 64 divisors (see below), whose sum is σ = 33220730880. Its totient is φ = 12862080000.

The previous prime is 22021120967. The next prime is 22021121047. The reversal of 22021121001 is 10012112022.

It is not a de Polignac number, because 22021121001 - 2⁹ = 22021120489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22021128001) 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, 22220616 + ... + 22221606.

It is an arithmetic number, because the mean of its divisors is an integer number (519073920).

Almost surely, 2^22021121001 is an apocalyptic number.

It is an amenable number.

22021121001 is a deficient number, since it is larger than the sum of its proper divisors (11199609879).

22021121001 is a wasteful number, since it uses less digits than its factorization.

22021121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278.

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

Adding to 22021121001 its reverse (10012112022), we get a palindrome (32033233023).

The spelling of 22021121001 in words is "twenty-two billion, twenty-one million, one hundred twenty-one thousand, one".