211121220110001 has 16 divisors (see below), whose sum is σ = 283043162845248. Its totient is φ = 139974388646400.

The previous prime is 211121220109991. The next prime is 211121220110063. The reversal of 211121220110001 is 100011022121112.

It is a happy number.

It is not a de Polignac number, because 211121220110001 - 2²² = 211121215915697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211121220110401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125403336 + ... + 127075721.

It is an arithmetic number, because the mean of its divisors is an integer number (17690197677828).

Almost surely, 2^{211121220110001} is an apocalyptic number.

It is an amenable number.

211121220110001 is a deficient number, since it is larger than the sum of its proper divisors (71921942735247).

211121220110001 is a wasteful number, since it uses less digits than its factorization.

211121220110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252480592.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211121220110001 its reverse (100011022121112), we get a palindrome (311132242231113).

The spelling of 211121220110001 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, one".