20201002222001 has 4 divisors (see below), whose sum is σ = 21389296470372. Its totient is φ = 19012707973632.

The previous prime is 20201002221979. The next prime is 20201002222003. The reversal of 20201002222001 is 10022220010202.

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 11798888372401 + 8402113849600 = 3434951^2 + 2898640^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201002222001 - 2¹⁰ = 20201002220977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201002222003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594147124160 + ... + 594147124193.

It is an arithmetic number, because the mean of its divisors is an integer number (5347324117593).

Almost surely, 2^{20201002222001} is an apocalyptic number.

It is an amenable number.

20201002222001 is a deficient number, since it is larger than the sum of its proper divisors (1188294248371).

20201002222001 is a wasteful number, since it uses less digits than its factorization.

20201002222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188294248370.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20201002222001 its reverse (10022220010202), we get a palindrome (30223222232203).

The spelling of 20201002222001 in words is "twenty trillion, two hundred one billion, two million, two hundred twenty-two thousand, one".