20022121222001 has 4 divisors (see below), whose sum is σ = 20209243850352. Its totient is φ = 19834998593652.

The previous prime is 20022121221943. The next prime is 20022121222039. The reversal of 20022121222001 is 10022212122002.

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 a de Polignac number, because none of the positive numbers 2^k-20022121222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022121221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93561314015 + ... + 93561314228.

It is an arithmetic number, because the mean of its divisors is an integer number (5052310962588).

Almost surely, 2^{20022121222001} is an apocalyptic number.

It is an amenable number.

20022121222001 is a deficient number, since it is larger than the sum of its proper divisors (187122628351).

20022121222001 is a wasteful number, since it uses less digits than its factorization.

20022121222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187122628350.

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

Adding to 20022121222001 its reverse (10022212122002), we get a palindrome (30044333344003).

Subtracting from 20022121222001 its reverse (10022212122002), we obtain a palindrome (9999909099999).

The spelling of 20022121222001 in words is "twenty trillion, twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, one".