211102221210121 has 4 divisors (see below), whose sum is σ = 211333947030144. Its totient is φ = 210870495390100.

The previous prime is 211102221210053. The next prime is 211102221210143. The reversal of 211102221210121 is 121012122201112.

It is a happy number.

211102221210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-211102221210121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211102221210151) 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, 115862908645 + ... + 115862910466.

It is an arithmetic number, because the mean of its divisors is an integer number (52833486757536).

Almost surely, 2^{211102221210121} is an apocalyptic number.

It is an amenable number.

211102221210121 is a deficient number, since it is larger than the sum of its proper divisors (231725820023).

211102221210121 is an equidigital number, since it uses as much as digits as its factorization.

211102221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231725820022.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211102221210121 its reverse (121012122201112), we get a palindrome (332114343411233).

Subtracting from 211102221210121 its reverse (121012122201112), we obtain a palindrome (90090099009009).

The spelling of 211102221210121 in words is "two hundred eleven trillion, one hundred two billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".