421633103240442 has 32 divisors (see below), whose sum is σ = 849423859909632. Its totient is φ = 139518098034944.

The previous prime is 421633103240431. The next prime is 421633103240521. The reversal of 421633103240442 is 244042301336124.

It is a self number, because there is not a number n which added to its sum of digits gives 421633103240442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475711438 + ... + 476596934.

It is an arithmetic number, because the mean of its divisors is an integer number (26544495622176).

Almost surely, 2^{421633103240442} is an apocalyptic number.

421633103240442 is an abundant number, since it is smaller than the sum of its proper divisors (427790756669190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421633103240442 is a wasteful number, since it uses less digits than its factorization.

421633103240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464902.

The product of its (nonzero) digits is 331776, while the sum is 39.

Adding to 421633103240442 its reverse (244042301336124), we get a palindrome (665675404576566).

The spelling of 421633103240442 in words is "four hundred twenty-one trillion, six hundred thirty-three billion, one hundred three million, two hundred forty thousand, four hundred forty-two".