201121010101 has 16 divisors (see below), whose sum is σ = 233490185280. Its totient is φ = 171208602880.

The previous prime is 201121010087. The next prime is 201121010117. The reversal of 201121010101 is 101010121102.

It is a cyclic number.

It is not a de Polignac number, because 201121010101 - 2³³ = 192531075509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121010141) 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 15 ways as a sum of consecutive naturals, for example, 2692891 + ... + 2766568.

It is an arithmetic number, because the mean of its divisors is an integer number (14593136580).

Almost surely, 2^201121010101 is an apocalyptic number.

It is an amenable number.

201121010101 is a deficient number, since it is larger than the sum of its proper divisors (32369175179).

201121010101 is a wasteful number, since it uses less digits than its factorization.

201121010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459684.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 201121010101 its reverse (101010121102), we get a palindrome (302131131203).

The spelling of 201121010101 in words is "two hundred one billion, one hundred twenty-one million, ten thousand, one hundred one".