201100100121001 has 16 divisors (see below), whose sum is σ = 212600129578560. Its totient is φ = 189926576199360.

The previous prime is 201100100120999. The next prime is 201100100121013. The reversal of 201100100121001 is 100121001001102.

It is a cyclic number.

It is not a de Polignac number, because 201100100121001 - 2¹ = 201100100120999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201100100121031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197133795 + ... + 198151288.

It is an arithmetic number, because the mean of its divisors is an integer number (13287508098660).

Almost surely, 2^{201100100121001} is an apocalyptic number.

It is an amenable number.

201100100121001 is a deficient number, since it is larger than the sum of its proper divisors (11500029457559).

201100100121001 is a wasteful number, since it uses less digits than its factorization.

201100100121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395285496.

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

Adding to 201100100121001 its reverse (100121001001102), we get a palindrome (301221101122103).

The spelling of 201100100121001 in words is "two hundred one trillion, one hundred billion, one hundred million, one hundred twenty-one thousand, one".