20202220021201 has 2 divisors, whose sum is σ = 20202220021202. Its totient is φ = 20202220021200.

The previous prime is 20202220021199. The next prime is 20202220021213. The reversal of 20202220021201 is 10212002220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11489828812225 + 8712391208976 = 3389665^2 + 2951676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202220021201 - 2¹ = 20202220021199 is a prime.

Together with 20202220021199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20202220021261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101110010600 + 10101110010601.

It is an arithmetic number, because the mean of its divisors is an integer number (10101110010601).

Almost surely, 2^{20202220021201} is an apocalyptic number.

It is an amenable number.

20202220021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202220021201 is an equidigital number, since it uses as much as digits as its factorization.

20202220021201 is an evil number, because the sum of its binary digits is even.

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

Adding to 20202220021201 its reverse (10212002220202), we get a palindrome (30414222241403).

The spelling of 20202220021201 in words is "twenty trillion, two hundred two billion, two hundred twenty million, twenty-one thousand, two hundred one".