11101001101921 has 2 divisors, whose sum is σ = 11101001101922. Its totient is φ = 11101001101920.

The previous prime is 11101001101903. The next prime is 11101001101973. The reversal of 11101001101921 is 12910110010111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10966065365025 + 134935736896 = 3311505^2 + 367336^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101001101921 - 2¹⁵ = 11101001069153 is a prime.

It is not a weakly prime, because it can be changed into another prime (11101001101901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550500550960 + 5550500550961.

It is an arithmetic number, because the mean of its divisors is an integer number (5550500550961).

Almost surely, 2^{11101001101921} is an apocalyptic number.

It is an amenable number.

11101001101921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101001101921 is an equidigital number, since it uses as much as digits as its factorization.

11101001101921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 11101001101921 in words is "eleven trillion, one hundred one billion, one million, one hundred one thousand, nine hundred twenty-one".