221111013 has 16 divisors (see below), whose sum is σ = 298172736. Its totient is φ = 145737600.

The previous prime is 221110997. The next prime is 221111021. The reversal of 221111013 is 310111122.

It is not a de Polignac number, because 221111013 - 2⁴ = 221110997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115363 + ... + 117263.

It is an arithmetic number, because the mean of its divisors is an integer number (18635796).

Almost surely, 2^221111013 is an apocalyptic number.

It is an amenable number.

221111013 is a deficient number, since it is larger than the sum of its proper divisors (77061723).

221111013 is a wasteful number, since it uses less digits than its factorization.

221111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 221111013 is about 14869.8020497921. The cubic root of 221111013 is about 604.6955761903.

Adding to 221111013 its reverse (310111122), we get a palindrome (531222135).

The spelling of 221111013 in words is "two hundred twenty-one million, one hundred eleven thousand, thirteen".