201101100121021 has 2 divisors, whose sum is σ = 201101100121022. Its totient is φ = 201101100121020.

The previous prime is 201101100120929. The next prime is 201101100121177. The reversal of 201101100121021 is 120121001101102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114048281476921 + 87052818644100 = 10679339^2 + 9330210^2 .

It is a cyclic number.

It is not a de Polignac number, because 201101100121021 - 2²⁹ = 201100563250109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201101100120992 and 201101100121010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201101100121321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550550060510 + 100550550060511.

It is an arithmetic number, because the mean of its divisors is an integer number (100550550060511).

Almost surely, 2^{201101100121021} is an apocalyptic number.

It is an amenable number.

201101100121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201101100121021 is an equidigital number, since it uses as much as digits as its factorization.

201101100121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201101100121021 its reverse (120121001101102), we get a palindrome (321222101222123).

The spelling of 201101100121021 in words is "two hundred one trillion, one hundred one billion, one hundred million, one hundred twenty-one thousand, twenty-one".