210101100201 has 12 divisors (see below), whose sum is σ = 305694546612. Its totient is φ = 139045009536.

The previous prime is 210101100197. The next prime is 210101100203. The reversal of 210101100201 is 102001101012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 182769075225 + 27332024976 = 427515^2 + 165324^2 .

It is not a de Polignac number, because 210101100201 - 2² = 210101100197 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 (210101100203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85197916 + ... + 85200381.

It is an arithmetic number, because the mean of its divisors is an integer number (25474545551).

Almost surely, 2^210101100201 is an apocalyptic number.

It is an amenable number.

210101100201 is a deficient number, since it is larger than the sum of its proper divisors (95593446411).

210101100201 is a wasteful number, since it uses less digits than its factorization.

210101100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170398440 (or 170398437 counting only the distinct ones).

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

Adding to 210101100201 its reverse (102001101012), we get a palindrome (312102201213).

It can be divided in two parts, 21010 and 1100201, that added together give a palindrome (1121211).

The spelling of 210101100201 in words is "two hundred ten billion, one hundred one million, one hundred thousand, two hundred one".