211101001121 has 4 divisors (see below), whose sum is σ = 215084038932. Its totient is φ = 207117963312.

The previous prime is 211101001091. The next prime is 211101001123. The reversal of 211101001121 is 121100101112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129139609600 + 81961391521 = 359360^2 + 286289^2 .

It is a cyclic number.

It is not a de Polignac number, because 211101001121 - 2¹⁴ = 211100984737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211101001123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991518826 + ... + 1991518931.

It is an arithmetic number, because the mean of its divisors is an integer number (53771009733).

Almost surely, 2^211101001121 is an apocalyptic number.

It is an amenable number.

211101001121 is a deficient number, since it is larger than the sum of its proper divisors (3983037811).

211101001121 is an equidigital number, since it uses as much as digits as its factorization.

211101001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983037810.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 211101001121 its reverse (121100101112), we get a palindrome (332201102233).

Subtracting from 211101001121 its reverse (121100101112), we obtain a palindrome (90000900009).

The spelling of 211101001121 in words is "two hundred eleven billion, one hundred one million, one thousand, one hundred twenty-one".