211121100110121 has 4 divisors (see below), whose sum is σ = 281494800146832. Its totient is φ = 140747400073412.

The previous prime is 211121100110101. The next prime is 211121100110177. The reversal of 211121100110121 is 121011001121112.

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 211121100110121 - 2⁷ = 211121100109993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211121100110121.

It is not an unprimeable number, because it can be changed into a prime (211121100110101) 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, 35186850018351 + ... + 35186850018356.

It is an arithmetic number, because the mean of its divisors is an integer number (70373700036708).

Almost surely, 2^{211121100110121} is an apocalyptic number.

It is an amenable number.

211121100110121 is a deficient number, since it is larger than the sum of its proper divisors (70373700036711).

211121100110121 is an equidigital number, since it uses as much as digits as its factorization.

211121100110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70373700036710.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 211121100110121 its reverse (121011001121112), we get a palindrome (332132101231233).

The spelling of 211121100110121 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred million, one hundred ten thousand, one hundred twenty-one".