201100101121205 has 32 divisors (see below), whose sum is σ = 283510048631040. Its totient is φ = 135003742318080.

The previous prime is 201100101121081. The next prime is 201100101121207. The reversal of 201100101121205 is 502121101001102.

It is not a de Polignac number, because 201100101121205 - 2¹² = 201100101117109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100101121207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304312136 + ... + 304972254.

It is an arithmetic number, because the mean of its divisors is an integer number (8859689019720).

Almost surely, 2^{201100101121205} is an apocalyptic number.

It is an amenable number.

201100101121205 is a deficient number, since it is larger than the sum of its proper divisors (82409947509835).

201100101121205 is a wasteful number, since it uses less digits than its factorization.

201100101121205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086221.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 201100101121205 its reverse (502121101001102), we get a palindrome (703221202122307).

The spelling of 201100101121205 in words is "two hundred one trillion, one hundred billion, one hundred one million, one hundred twenty-one thousand, two hundred five".