20201222202001 has 4 divisors (see below), whose sum is σ = 21389529390372. Its totient is φ = 19012915013632.

The previous prime is 20201222201981. The next prime is 20201222202023. The reversal of 20201222202001 is 10020222210202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18383093577601 + 1818128624400 = 4287551^2 + 1348380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201222202001 - 2²³ = 20201213813393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201222202071) 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, 594153594160 + ... + 594153594193.

It is an arithmetic number, because the mean of its divisors is an integer number (5347382347593).

Almost surely, 2^{20201222202001} is an apocalyptic number.

It is an amenable number.

20201222202001 is a deficient number, since it is larger than the sum of its proper divisors (1188307188371).

20201222202001 is a wasteful number, since it uses less digits than its factorization.

20201222202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188307188370.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20201222202001 its reverse (10020222210202), we get a palindrome (30221444412203).

The spelling of 20201222202001 in words is "twenty trillion, two hundred one billion, two hundred twenty-two million, two hundred two thousand, one".