211212221101 has 8 divisors (see below), whose sum is σ = 244440907520. Its totient is φ = 178747412688.

The previous prime is 211212221071. The next prime is 211212221111. The reversal of 211212221101 is 101122212112.

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 211212221101 - 2⁵ = 211212221069 is a prime.

It is a super-2 number, since 2×211212221101² (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 (211212221111) 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, 190968906 + ... + 190970011.

It is an arithmetic number, because the mean of its divisors is an integer number (30555113440).

Almost surely, 2^211212221101 is an apocalyptic number.

It is an amenable number.

211212221101 is a deficient number, since it is larger than the sum of its proper divisors (33228686419).

211212221101 is an equidigital number, since it uses as much as digits as its factorization.

211212221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381939003.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211212221101 its reverse (101122212112), we get a palindrome (312334433213).

The spelling of 211212221101 in words is "two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, one hundred one".