20021002012201 has 8 divisors (see below), whose sum is σ = 20627971536584. Its totient is φ = 19423024629120.

The previous prime is 20021002012183. The next prime is 20021002012229. The reversal of 20021002012201 is 10221020012002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4654202169600 + 15366799842601 = 2157360^2 + 3920051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20021002012201 - 2²³ = 20020993623593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021002012261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2248030806 + ... + 2248039711.

It is an arithmetic number, because the mean of its divisors is an integer number (2578496442073).

Almost surely, 2^{20021002012201} is an apocalyptic number.

It is an amenable number.

20021002012201 is a deficient number, since it is larger than the sum of its proper divisors (606969524383).

20021002012201 is an equidigital number, since it uses as much as digits as its factorization.

20021002012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496070651.

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

Adding to 20021002012201 its reverse (10221020012002), we get a palindrome (30242022024203).

The spelling of 20021002012201 in words is "twenty trillion, twenty-one billion, two million, twelve thousand, two hundred one".