211121101101101 has 4 divisors (see below), whose sum is σ = 211121158215132. Its totient is φ = 211121043987072.

The previous prime is 211121101101091. The next prime is 211121101101167. The reversal of 211121101101101 is 101101101121112.

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 132359824791076 + 78761276310025 = 11504774^2 + 8874755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211121101101101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121101104101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22597766 + ... + 30543431.

It is an arithmetic number, because the mean of its divisors is an integer number (52780289553783).

Almost surely, 2^{211121101101101} is an apocalyptic number.

It is an amenable number.

211121101101101 is a deficient number, since it is larger than the sum of its proper divisors (57114031).

211121101101101 is an equidigital number, since it uses as much as digits as its factorization.

211121101101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57114030.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 211121101101101 its reverse (101101101121112), we get a palindrome (312222202222213).

The spelling of 211121101101101 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred one million, one hundred one thousand, one hundred one".