202020220001 has 4 divisors (see below), whose sum is σ = 213903762372. Its totient is φ = 190136677632.

The previous prime is 202020219971. The next prime is 202020220013. The reversal of 202020220001 is 100022020202.

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 125609992225 + 76410227776 = 354415^2 + 276424^2 .

It is a cyclic number.

It is not a de Polignac number, because 202020220001 - 2⁶ = 202020219937 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 (202020220201) 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, 5941771160 + ... + 5941771193.

It is an arithmetic number, because the mean of its divisors is an integer number (53475940593).

Almost surely, 2^202020220001 is an apocalyptic number.

It is an amenable number.

202020220001 is a deficient number, since it is larger than the sum of its proper divisors (11883542371).

202020220001 is a wasteful number, since it uses less digits than its factorization.

202020220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11883542370.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 202020220001 its reverse (100022020202), we get a palindrome (302042240203).

The spelling of 202020220001 in words is "two hundred two billion, twenty million, two hundred twenty thousand, one".