11121221212211 has 8 divisors (see below), whose sum is σ = 12252362524848. Its totient is φ = 10010100100000.

The previous prime is 11121221212181. The next prime is 11121221212223. The reversal of 11121221212211 is 11221212212111.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-11121221212211 is a prime.

It is a super-2 number, since 2×11121221212211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11121221212261) 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, 5005048940 + ... + 5005051161.

It is an arithmetic number, because the mean of its divisors is an integer number (1531545315606).

Almost surely, 2^{11121221212211} is an apocalyptic number.

11121221212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121221212211 is a deficient number, since it is larger than the sum of its proper divisors (1131141312637).

11121221212211 is a wasteful number, since it uses less digits than its factorization.

11121221212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010100213.

The product of its digits is 64, while the sum is 20.

Adding to 11121221212211 its reverse (11221212212111), we get a palindrome (22342433424322).

The spelling of 11121221212211 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred eleven".