201541121001 has 32 divisors (see below), whose sum is σ = 328100630400. Its totient is φ = 121254531840.

The previous prime is 201541120997. The next prime is 201541121027. The reversal of 201541121001 is 100121145102.

201541121001 is a `hidden beast` number, since 2 + 0 + 1 + 541 + 121 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 201541121001 - 2² = 201541120997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201541121081) 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 31 ways as a sum of consecutive naturals, for example, 2435916 + ... + 2517293.

It is an arithmetic number, because the mean of its divisors is an integer number (10253144700).

Almost surely, 2^201541121001 is an apocalyptic number.

It is an amenable number.

201541121001 is a deficient number, since it is larger than the sum of its proper divisors (126559509399).

201541121001 is a wasteful number, since it uses less digits than its factorization.

201541121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953366 (or 4953360 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 201541121001 its reverse (100121145102), we get a palindrome (301662266103).

The spelling of 201541121001 in words is "two hundred one billion, five hundred forty-one million, one hundred twenty-one thousand, one".