221021240113 has 8 divisors (see below), whose sum is σ = 229309090560. Its totient is φ = 212805773040.

The previous prime is 221021240087. The next prime is 221021240137. The reversal of 221021240113 is 311042120122.

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-221021240113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021241113) 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, 18089623 + ... + 18101836.

It is an arithmetic number, because the mean of its divisors is an integer number (28663636320).

Almost surely, 2^221021240113 is an apocalyptic number.

It is an amenable number.

221021240113 is a deficient number, since it is larger than the sum of its proper divisors (8287850447).

221021240113 is a wasteful number, since it uses less digits than its factorization.

221021240113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36191687.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221021240113 its reverse (311042120122), we get a palindrome (532063360235).

The spelling of 221021240113 in words is "two hundred twenty-one billion, twenty-one million, two hundred forty thousand, one hundred thirteen".