211121211110101 has 4 divisors (see below), whose sum is σ = 211180732176832. Its totient is φ = 211061690043372.

The previous prime is 211121211110059. The next prime is 211121211110113. The reversal of 211121211110101 is 101011112121112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211121211110101 - 2²⁵ = 211121177555669 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 (211121211110701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29760528045 + ... + 29760535138.

It is an arithmetic number, because the mean of its divisors is an integer number (52795183044208).

Almost surely, 2^{211121211110101} is an apocalyptic number.

It is an amenable number.

211121211110101 is a deficient number, since it is larger than the sum of its proper divisors (59521066731).

211121211110101 is an equidigital number, since it uses as much as digits as its factorization.

211121211110101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59521066730.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 211121211110101 its reverse (101011112121112), we get a palindrome (312132323231213).

It can be divided in two parts, 21112121 and 1110101, that added together give a palindrome (22222222).

The spelling of 211121211110101 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, one hundred one".