20011020201 has 24 divisors (see below), whose sum is σ = 29267339400. Its totient is φ = 13174396416.

The previous prime is 20011020199. The next prime is 20011020221. The reversal of 20011020201 is 10202011002.

It can be written as a sum of positive squares in 4 ways, for example, as 79227801 + 19931792400 = 8901^2 + 141180^2 .

It is not a de Polignac number, because 20011020201 - 2¹ = 20011020199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20011020221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188865 + ... + 275121.

It is an arithmetic number, because the mean of its divisors is an integer number (1219472475).

Almost surely, 2^20011020201 is an apocalyptic number.

It is an amenable number.

20011020201 is a deficient number, since it is larger than the sum of its proper divisors (9256319199).

20011020201 is a wasteful number, since it uses less digits than its factorization.

20011020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86585 (or 86582 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20011020201 its reverse (10202011002), we get a palindrome (30213031203).

The spelling of 20011020201 in words is "twenty billion, eleven million, twenty thousand, two hundred one".