421222140442 has 16 divisors (see below), whose sum is σ = 658672510464. Its totient is φ = 201799170000.

The previous prime is 421222140389. The next prime is 421222140487. The reversal of 421222140442 is 244041222124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 421222140442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33626934 + ... + 33639457.

It is an arithmetic number, because the mean of its divisors is an integer number (41167031904).

Almost surely, 2^421222140442 is an apocalyptic number.

421222140442 is a deficient number, since it is larger than the sum of its proper divisors (237450370022).

421222140442 is a wasteful number, since it uses less digits than its factorization.

421222140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67266525.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 421222140442 its reverse (244041222124), we get a palindrome (665263362566).

The spelling of 421222140442 in words is "four hundred twenty-one billion, two hundred twenty-two million, one hundred forty thousand, four hundred forty-two".