201001210121 has 8 divisors (see below), whose sum is σ = 216500692320. Its totient is φ = 185993775072.

The previous prime is 201001210079. The next prime is 201001210129. The reversal of 201001210121 is 121012100102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201001210121 is a prime.

It is a super-3 number, since 3×201001210121³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201001210129) 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 7 ways as a sum of consecutive naturals, for example, 123010940 + ... + 123012573.

It is an arithmetic number, because the mean of its divisors is an integer number (27062586540).

Almost surely, 2^201001210121 is an apocalyptic number.

It is an amenable number.

201001210121 is a deficient number, since it is larger than the sum of its proper divisors (15499482199).

201001210121 is a wasteful number, since it uses less digits than its factorization.

201001210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246023575.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201001210121 its reverse (121012100102), we get a palindrome (322013310223).

The spelling of 201001210121 in words is "two hundred one billion, one million, two hundred ten thousand, one hundred twenty-one".