201201220101 has 24 divisors (see below), whose sum is σ = 313010075424. Its totient is φ = 114624750240.

The previous prime is 201201220067. The next prime is 201201220193. The reversal of 201201220101 is 101022102102.

201201220101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201201220101 - 2¹⁷ = 201201089029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201220301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2018890 + ... + 2116203.

It is an arithmetic number, because the mean of its divisors is an integer number (13042086476).

Almost surely, 2^201201220101 is an apocalyptic number.

201201220101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201201220101 is a deficient number, since it is larger than the sum of its proper divisors (111808855323).

201201220101 is a wasteful number, since it uses less digits than its factorization.

201201220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135441 (or 4135434 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201201220101 its reverse (101022102102), we get a palindrome (302223322203).

The spelling of 201201220101 in words is "two hundred one billion, two hundred one million, two hundred twenty thousand, one hundred one".