211221210100011 has 8 divisors (see below), whose sum is σ = 290713063363584. Its totient is φ = 136271748451560.

The previous prime is 211221210100007. The next prime is 211221210100027. The reversal of 211221210100011 is 110001012122112.

It is a happy number.

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

It is not a de Polignac number, because 211221210100011 - 2² = 211221210100007 is a prime.

It is a super-2 number, since 2×211221210100011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221210102011) 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, 1135597903671 + ... + 1135597903856.

It is an arithmetic number, because the mean of its divisors is an integer number (36339132920448).

Almost surely, 2^{211221210100011} is an apocalyptic number.

211221210100011 is a deficient number, since it is larger than the sum of its proper divisors (79491853263573).

211221210100011 is a wasteful number, since it uses less digits than its factorization.

211221210100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271195807561.

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

Adding to 211221210100011 its reverse (110001012122112), we get a palindrome (321222222222123).

The spelling of 211221210100011 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, one hundred thousand, eleven".