220012221021 has 4 divisors (see below), whose sum is σ = 293349628032. Its totient is φ = 146674814012.

The previous prime is 220012220969. The next prime is 220012221041. The reversal of 220012221021 is 120122210022.

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 a cyclic number.

It is not a de Polignac number, because 220012221021 - 2⁹ = 220012220509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012221041) 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, 36668703501 + ... + 36668703506.

It is an arithmetic number, because the mean of its divisors is an integer number (73337407008).

Almost surely, 2^220012221021 is an apocalyptic number.

It is an amenable number.

220012221021 is a deficient number, since it is larger than the sum of its proper divisors (73337407011).

220012221021 is an equidigital number, since it uses as much as digits as its factorization.

220012221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73337407010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220012221021 its reverse (120122210022), we get a palindrome (340134431043).

The spelling of 220012221021 in words is "two hundred twenty billion, twelve million, two hundred twenty-one thousand, twenty-one".