220321121123 has 4 divisors (see below), whose sum is σ = 220648493448. Its totient is φ = 219993748800.

The previous prime is 220321121057. The next prime is 220321121147. The reversal of 220321121123 is 321121123022.

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

It is a cyclic number.

It is not a de Polignac number, because 220321121123 - 2¹⁰ = 220321120099 is a prime.

It is a super-2 number, since 2×220321121123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220321121095 and 220321121104.

It is not an unprimeable number, because it can be changed into a prime (220321121183) 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, 163685153 + ... + 163686498.

It is an arithmetic number, because the mean of its divisors is an integer number (55162123362).

Almost surely, 2^220321121123 is an apocalyptic number.

220321121123 is a deficient number, since it is larger than the sum of its proper divisors (327372325).

220321121123 is an equidigital number, since it uses as much as digits as its factorization.

220321121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327372324.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 220321121123 its reverse (321121123022), we get a palindrome (541442244145).

The spelling of 220321121123 in words is "two hundred twenty billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-three".