221211110011 has 4 divisors (see below), whose sum is σ = 221443231752. Its totient is φ = 220978988272.

The previous prime is 221211109993. The next prime is 221211110069. The reversal of 221211110011 is 110011112122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221211110011 - 2⁷ = 221211109883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221211109973 and 221211110000.

It is not an unprimeable number, because it can be changed into a prime (221211114011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116059441 + ... + 116061346.

It is an arithmetic number, because the mean of its divisors is an integer number (55360807938).

Almost surely, 2^221211110011 is an apocalyptic number.

221211110011 is a deficient number, since it is larger than the sum of its proper divisors (232121741).

221211110011 is an equidigital number, since it uses as much as digits as its factorization.

221211110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232121740.

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

Adding to 221211110011 its reverse (110011112122), we get a palindrome (331222222133).

The spelling of 221211110011 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, eleven".