21100201090049 has 2 divisors, whose sum is σ = 21100201090050. Its totient is φ = 21100201090048.

The previous prime is 21100201090019. The next prime is 21100201090079. The reversal of 21100201090049 is 94009010200112.

It is a balanced prime because it is at equal distance from previous prime (21100201090019) and next prime (21100201090079).

It can be written as a sum of positive squares in only one way, i.e., 14375229595024 + 6724971495025 = 3791468^2 + 2593255^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100201090049 - 2³⁶ = 21031481613313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21100201090019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550100545024 + 10550100545025.

It is an arithmetic number, because the mean of its divisors is an integer number (10550100545025).

Almost surely, 2^{21100201090049} is an apocalyptic number.

It is an amenable number.

21100201090049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100201090049 is an equidigital number, since it uses as much as digits as its factorization.

21100201090049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21100201090049 in words is "twenty-one trillion, one hundred billion, two hundred one million, ninety thousand, forty-nine".