210221030120042 has 16 divisors (see below), whose sum is σ = 316589361236064. Its totient is φ = 104691247050000.

The previous prime is 210221030120033. The next prime is 210221030120047. The reversal of 210221030120042 is 240021030122012.

It is a junction number, because it is equal to n+sod(n) for n = 210221030119996 and 210221030120023.

It is not an unprimeable number, because it can be changed into a prime (210221030120047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118080917 + ... + 119848007.

It is an arithmetic number, because the mean of its divisors is an integer number (19786835077254).

Almost surely, 2^{210221030120042} is an apocalyptic number.

210221030120042 is a deficient number, since it is larger than the sum of its proper divisors (106368331116022).

210221030120042 is a wasteful number, since it uses less digits than its factorization.

210221030120042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004325.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 210221030120042 its reverse (240021030122012), we get a palindrome (450242060242054).

The spelling of 210221030120042 in words is "two hundred ten trillion, two hundred twenty-one billion, thirty million, one hundred twenty thousand, forty-two".