20021020201201 has 4 divisors (see below), whose sum is σ = 20021159148004. Its totient is φ = 20020881254400.

The previous prime is 20021020201187. The next prime is 20021020201223. The reversal of 20021020201201 is 10210202012002.

It is a happy number.

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 9218656178176 + 10802364023025 = 3036224^2 + 3286695^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021020201201 - 2⁹ = 20021020200689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022020201201) 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, 69257040 + ... + 69545521.

It is an arithmetic number, because the mean of its divisors is an integer number (5005289787001).

Almost surely, 2^{20021020201201} is an apocalyptic number.

It is an amenable number.

20021020201201 is a deficient number, since it is larger than the sum of its proper divisors (138946803).

20021020201201 is a wasteful number, since it uses less digits than its factorization.

20021020201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138946802.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021020201201 its reverse (10210202012002), we get a palindrome (30231222213203).

The spelling of 20021020201201 in words is "twenty trillion, twenty-one billion, twenty million, two hundred one thousand, two hundred one".