220120000042 has 4 divisors (see below), whose sum is σ = 330180000066. Its totient is φ = 110060000020.

The previous prime is 220120000033. The next prime is 220120000123. The reversal of 220120000042 is 240000021022.

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

It can be written as a sum of positive squares in only one way, i.e., 195902726881 + 24217273161 = 442609^2 + 155619^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 220119999977 and 220120000031.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55030000009 + ... + 55030000012.

Almost surely, 2^220120000042 is an apocalyptic number.

220120000042 is a deficient number, since it is larger than the sum of its proper divisors (110060000024).

220120000042 is a wasteful number, since it uses less digits than its factorization.

220120000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110060000023.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 220120000042 its reverse (240000021022), we get a palindrome (460120021064).

The spelling of 220120000042 in words is "two hundred twenty billion, one hundred twenty million, forty-two", and thus it is an aban number.