211221101101 has 8 divisors (see below), whose sum is σ = 223663089024. Its totient is φ = 198781026240.

The previous prime is 211221101099. The next prime is 211221101137. The reversal of 211221101101 is 101101122112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211221101101 - 2¹ = 211221101099 is a prime.

It is a super-2 number, since 2×211221101101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221101191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247765 + ... + 695578.

It is an arithmetic number, because the mean of its divisors is an integer number (27957886128).

Almost surely, 2^211221101101 is an apocalyptic number.

It is an amenable number.

211221101101 is a deficient number, since it is larger than the sum of its proper divisors (12441987923).

211221101101 is a wasteful number, since it uses less digits than its factorization.

211221101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956531.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211221101101 its reverse (101101122112), we get a palindrome (312322223213).

The spelling of 211221101101 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred one thousand, one hundred one".