201212210101 has 4 divisors (see below), whose sum is σ = 229956811552. Its totient is φ = 172467608652.

The previous prime is 201212209949. The next prime is 201212210113. The reversal of 201212210101 is 101012212102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201212210101 - 2¹¹ = 201212208053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212210141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14372300715 + ... + 14372300728.

It is an arithmetic number, because the mean of its divisors is an integer number (57489202888).

Almost surely, 2^201212210101 is an apocalyptic number.

It is an amenable number.

201212210101 is a deficient number, since it is larger than the sum of its proper divisors (28744601451).

201212210101 is an equidigital number, since it uses as much as digits as its factorization.

201212210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28744601450.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201212210101 its reverse (101012212102), we get a palindrome (302224422203).

The spelling of 201212210101 in words is "two hundred one billion, two hundred twelve million, two hundred ten thousand, one hundred one".