220243210402 has 4 divisors (see below), whose sum is σ = 330364815606. Its totient is φ = 110121605200.

The previous prime is 220243210387. The next prime is 220243210403. The reversal of 220243210402 is 204012342022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204012342022 = 2 ⋅102006171011.

It can be written as a sum of positive squares in only one way, i.e., 165576561921 + 54666648481 = 406911^2 + 233809^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (220243210403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060802599 + ... + 55060802602.

Almost surely, 2^220243210402 is an apocalyptic number.

220243210402 is a deficient number, since it is larger than the sum of its proper divisors (110121605204).

220243210402 is a wasteful number, since it uses less digits than its factorization.

220243210402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110121605203.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 220243210402 its reverse (204012342022), we get a palindrome (424255552424).

The spelling of 220243210402 in words is "two hundred twenty billion, two hundred forty-three million, two hundred ten thousand, four hundred two".