220724683121 has 4 divisors (see below), whose sum is σ = 221648217600. Its totient is φ = 219801148644.

The previous prime is 220724683117. The next prime is 220724683141. The reversal of 220724683121 is 121386427022.

It is a happy number.

220724683121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220724683121 - 2² = 220724683117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220724683141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461766881 + ... + 461767358.

It is an arithmetic number, because the mean of its divisors is an integer number (55412054400).

Almost surely, 2^220724683121 is an apocalyptic number.

It is an amenable number.

220724683121 is a deficient number, since it is larger than the sum of its proper divisors (923534479).

220724683121 is an equidigital number, since it uses as much as digits as its factorization.

220724683121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923534478.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 220724683121 in words is "two hundred twenty billion, seven hundred twenty-four million, six hundred eighty-three thousand, one hundred twenty-one".