220120011221 has 4 divisors (see below), whose sum is σ = 240130921344. Its totient is φ = 200109101100.

The previous prime is 220120011203. The next prime is 220120011239. The reversal of 220120011221 is 122110021022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (220120011203) and next prime (220120011239).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220120011221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220120011196 and 220120011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120011721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10005455045 + ... + 10005455066.

It is an arithmetic number, because the mean of its divisors is an integer number (60032730336).

Almost surely, 2^220120011221 is an apocalyptic number.

It is an amenable number.

220120011221 is a deficient number, since it is larger than the sum of its proper divisors (20010910123).

220120011221 is a wasteful number, since it uses less digits than its factorization.

220120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20010910122.

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

Adding to 220120011221 its reverse (122110021022), we get a palindrome (342230032243).

The spelling of 220120011221 in words is "two hundred twenty billion, one hundred twenty million, eleven thousand, two hundred twenty-one".