221214011 has 4 divisors (see below), whose sum is σ = 221522400. Its totient is φ = 220905624.

The previous prime is 221213987. The next prime is 221214043. The reversal of 221214011 is 110412122.

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 221214011 - 2¹⁰ = 221212987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221214811) 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, 153116 + ... + 154553.

It is an arithmetic number, because the mean of its divisors is an integer number (55380600).

Almost surely, 2^221214011 is an apocalyptic number.

221214011 is a deficient number, since it is larger than the sum of its proper divisors (308389).

221214011 is an equidigital number, since it uses as much as digits as its factorization.

221214011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308388.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 221214011 is about 14873.2649744432. The cubic root of 221214011 is about 604.7894547746.

Adding to 221214011 its reverse (110412122), we get a palindrome (331626133).

The spelling of 221214011 in words is "two hundred twenty-one million, two hundred fourteen thousand, eleven".