221221020201113 has 4 divisors (see below), whose sum is σ = 221547786849060. Its totient is φ = 220894253553168.

The previous prime is 221221020201109. The next prime is 221221020201121. The reversal of 221221020201113 is 311102020122122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141576872337664 + 79644147863449 = 11898608^2 + 8924357^2 .

It is a cyclic number.

It is not a de Polignac number, because 221221020201113 - 2² = 221221020201109 is a prime.

It is a super-3 number, since 3×221221020201113³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221020201133) 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, 163383322958 + ... + 163383324311.

It is an arithmetic number, because the mean of its divisors is an integer number (55386946712265).

Almost surely, 2^{221221020201113} is an apocalyptic number.

It is an amenable number.

221221020201113 is a deficient number, since it is larger than the sum of its proper divisors (326766647947).

221221020201113 is an equidigital number, since it uses as much as digits as its factorization.

221221020201113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326766647946.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221221020201113 its reverse (311102020122122), we get a palindrome (532323040323235).

The spelling of 221221020201113 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred one thousand, one hundred thirteen".