211121220101121 has 24 divisors (see below), whose sum is σ = 332727432641760. Its totient is φ = 127932419736000.

The previous prime is 211121220101119. The next prime is 211121220101159. The reversal of 211121220101121 is 121101022121112.

It is a happy number.

211121220101121 is a `hidden beast` number, since 211 + 1 + 212 + 20 + 101 + 121 = 666.

It is not a de Polignac number, because 211121220101121 - 2¹ = 211121220101119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211121220101094 and 211121220101103.

It is not an unprimeable number, because it can be changed into a prime (211121220101191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164648716 + ... + 165926013.

It is an arithmetic number, because the mean of its divisors is an integer number (13863643026740).

Almost surely, 2^{211121220101121} is an apocalyptic number.

It is an amenable number.

211121220101121 is a deficient number, since it is larger than the sum of its proper divisors (121606212540639).

211121220101121 is a wasteful number, since it uses less digits than its factorization.

211121220101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330581197 (or 330581194 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211121220101121 its reverse (121101022121112), we get a palindrome (332222242222233).

The spelling of 211121220101121 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred one thousand, one hundred twenty-one".