221013013 has 8 divisors (see below), whose sum is σ = 238140000. Its totient is φ = 203904048.

The previous prime is 221013011. The next prime is 221013017. The reversal of 221013013 is 310310122.

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

It is a cyclic number.

It is not a de Polignac number, because 221013013 - 2¹ = 221013011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

221013013 is a modest number, since divided by 13013 gives 221 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 221012984 and 221013002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013011) 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, 31938 + ... + 38236.

It is an arithmetic number, because the mean of its divisors is an integer number (29767500).

Almost surely, 2^221013013 is an apocalyptic number.

It is an amenable number.

221013013 is a deficient number, since it is larger than the sum of its proper divisors (17126987).

221013013 is a wasteful number, since it uses less digits than its factorization.

221013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221013013 is about 14866.5064154293. The cubic root of 221013013 is about 604.6062260145.

Adding to 221013013 its reverse (310310122), we get a palindrome (531323135).

The spelling of 221013013 in words is "two hundred twenty-one million, thirteen thousand, thirteen".