20021122222001 has 8 divisors (see below), whose sum is σ = 20027076512640. Its totient is φ = 20015168251248.

The previous prime is 20021122221953. The next prime is 20021122222039. The reversal of 20021122222001 is 10022222112002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021122222001 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 (20021122222061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190430690 + ... + 190535796.

It is an arithmetic number, because the mean of its divisors is an integer number (2503384564080).

Almost surely, 2^{20021122222001} is an apocalyptic number.

It is an amenable number.

20021122222001 is a deficient number, since it is larger than the sum of its proper divisors (5954290639).

20021122222001 is a wasteful number, since it uses less digits than its factorization.

20021122222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159943.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20021122222001 its reverse (10022222112002), we get a palindrome (30043344334003).

The spelling of 20021122222001 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one".