201001220121 has 8 divisors (see below), whose sum is σ = 288617136640. Its totient is φ = 123693058512.

The previous prime is 201001220117. The next prime is 201001220143. The reversal of 201001220121 is 121022100102.

201001220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201001220121 - 2² = 201001220117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201001220097 and 201001220106.

It is not an unprimeable number, because it can be changed into a prime (201001220221) 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 7 ways as a sum of consecutive naturals, for example, 2576938681 + ... + 2576938758.

It is an arithmetic number, because the mean of its divisors is an integer number (36077142080).

Almost surely, 2^201001220121 is an apocalyptic number.

It is an amenable number.

201001220121 is a deficient number, since it is larger than the sum of its proper divisors (87615916519).

201001220121 is a wasteful number, since it uses less digits than its factorization.

201001220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153877455.

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

Adding to 201001220121 its reverse (121022100102), we get a palindrome (322023320223).

The spelling of 201001220121 in words is "two hundred one billion, one million, two hundred twenty thousand, one hundred twenty-one".