20001001201 has 2 divisors, whose sum is σ = 20001001202. Its totient is φ = 20001001200.

The previous prime is 20001001183. The next prime is 20001001291. The reversal of 20001001201 is 10210010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15811805025 + 4189196176 = 125745^2 + 64724^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001001201 - 2⁵ = 20001001169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001001291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000500600 + 10000500601.

It is an arithmetic number, because the mean of its divisors is an integer number (10000500601).

Almost surely, 2^20001001201 is an apocalyptic number.

It is an amenable number.

20001001201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001001201 is an equidigital number, since it uses as much as digits as its factorization.

20001001201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20001001201 its reverse (10210010002), we get a palindrome (30211011203).

The spelling of 20001001201 in words is "twenty billion, one million, one thousand, two hundred one".