220861201442 has 54 divisors (see below), whose sum is σ = 399371439987. Its totient is φ = 91335013728.

The previous prime is 220861201441. The next prime is 220861201523. The reversal of 220861201442 is 244102168022.

220861201442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 8663700241 + 212197501201 = 93079^2 + 460649^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332311.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220861201399 and 220861201408.

It is not an unprimeable number, because it can be changed into a prime (220861201441) 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 26 ways as a sum of consecutive naturals, for example, 134917448 + ... + 134919084.

Almost surely, 2^220861201442 is an apocalyptic number.

220861201442 is a deficient number, since it is larger than the sum of its proper divisors (178510238545).

220861201442 is an frugal number, since it uses more digits than its factorization.

220861201442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348 (or 1675 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

Multiplying 220861201442 by its sum of digits (32), we get a square (7067558446144 = 2658488²).

Adding to 220861201442 its reverse (244102168022), we get a palindrome (464963369464).

The spelling of 220861201442 in words is "two hundred twenty billion, eight hundred sixty-one million, two hundred one thousand, four hundred forty-two".