221101211011 has 8 divisors (see below), whose sum is σ = 221325615504. Its totient is φ = 220876915200.

The previous prime is 221101210987. The next prime is 221101211021. The reversal of 221101211011 is 110112101122.

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 a de Polignac number, because none of the positive numbers 2^k-221101211011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221101210982 and 221101211000.

It is not an unprimeable number, because it can be changed into a prime (221101211021) 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, 4402635 + ... + 4452571.

It is an arithmetic number, because the mean of its divisors is an integer number (27665701938).

Almost surely, 2^221101211011 is an apocalyptic number.

221101211011 is a deficient number, since it is larger than the sum of its proper divisors (224404493).

221101211011 is a wasteful number, since it uses less digits than its factorization.

221101211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54341.

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

Adding to 221101211011 its reverse (110112101122), we get a palindrome (331213312133).

The spelling of 221101211011 in words is "two hundred twenty-one billion, one hundred one million, two hundred eleven thousand, eleven".