421204332140242 has 16 divisors (see below), whose sum is σ = 722074361726592. Its totient is φ = 180513694260000.

The previous prime is 421204332140239. The next prime is 421204332140321. The reversal of 421204332140242 is 242041233402124.

It is a junction number, because it is equal to n+sod(n) for n = 421204332140198 and 421204332140207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202937763 + ... + 205002790.

It is an arithmetic number, because the mean of its divisors is an integer number (45129647607912).

Almost surely, 2^{421204332140242} is an apocalyptic number.

421204332140242 is a deficient number, since it is larger than the sum of its proper divisors (300870029586350).

421204332140242 is a wasteful number, since it uses less digits than its factorization.

421204332140242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408014313.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 421204332140242 its reverse (242041233402124), we get a palindrome (663245565542366).

The spelling of 421204332140242 in words is "four hundred twenty-one trillion, two hundred four billion, three hundred thirty-two million, one hundred forty thousand, two hundred forty-two".