421120121442 has 48 divisors (see below), whose sum is σ = 918194403360. Its totient is φ = 128399572224.

The previous prime is 421120121441. The next prime is 421120121459. The reversal of 421120121442 is 244121021124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (421120121441) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2100343 + ... + 2292090.

It is an arithmetic number, because the mean of its divisors is an integer number (19129050070).

Almost surely, 2^421120121442 is an apocalyptic number.

421120121442 is an abundant number, since it is smaller than the sum of its proper divisors (497074281918).

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

421120121442 is a wasteful number, since it uses less digits than its factorization.

421120121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392515 (or 4392486 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 421120121442 its reverse (244121021124), we get a palindrome (665241142566).

The spelling of 421120121442 in words is "four hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, four hundred forty-two".