20010111201 has 6 divisors (see below), whose sum is σ = 28903493970. Its totient is φ = 13340074128.

The previous prime is 20010111197. The next prime is 20010111203. The reversal of 20010111201 is 10211101002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19972472976 + 37638225 = 141324^2 + 6135^2 .

It is not a de Polignac number, because 20010111201 - 2² = 20010111197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2223345689 = 20010111201 / (2 + 0 + 0 + 1 + 0 + 1 + 1 + 1 + 2 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (20010111203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111672836 + ... + 1111672853.

It is an arithmetic number, because the mean of its divisors is an integer number (4817248995).

Almost surely, 2^20010111201 is an apocalyptic number.

It is an amenable number.

20010111201 is a deficient number, since it is larger than the sum of its proper divisors (8893382769).

20010111201 is a wasteful number, since it uses less digits than its factorization.

20010111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223345695 (or 2223345692 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20010111201 its reverse (10211101002), we get a palindrome (30221212203).

The spelling of 20010111201 in words is "twenty billion, ten million, one hundred eleven thousand, two hundred one".