211221012211101 has 10 divisors (see below), whose sum is σ = 315527684908062. Its totient is φ = 140814008140680.

The previous prime is 211221012211093. The next prime is 211221012211133. The reversal of 211221012211101 is 101112210122112.

It is a happy number.

211221012211101 is a `hidden beast` number, since 211 + 22 + 101 + 221 + 110 + 1 = 666.

211221012211101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 199313688622500 + 11907323588601 = 14117850^2 + 3450699^2 .

It is not a de Polignac number, because 211221012211101 - 2³ = 211221012211093 is a prime.

It is a super-2 number, since 2×211221012211101² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221012211501) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1303833408630 + ... + 1303833408791.

Almost surely, 2^{211221012211101} is an apocalyptic number.

It is an amenable number.

211221012211101 is a deficient number, since it is larger than the sum of its proper divisors (104306672696961).

211221012211101 is an equidigital number, since it uses as much as digits as its factorization.

211221012211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607666817433 (or 2607666817424 counting only the distinct ones).

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

Adding to 211221012211101 its reverse (101112210122112), we get a palindrome (312333222333213).

The spelling of 211221012211101 in words is "two hundred eleven trillion, two hundred twenty-one billion, twelve million, two hundred eleven thousand, one hundred one".