421001420340020 has 96 divisors (see below), whose sum is σ = 1003600585478400. Its totient is φ = 147062707190784.

The previous prime is 421001420339939. The next prime is 421001420340091. The reversal of 421001420340020 is 20043024100124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55021385 + ... + 62204144.

It is an arithmetic number, because the mean of its divisors is an integer number (10454172765400).

Almost surely, 2^{421001420340020} is an apocalyptic number.

It is an amenable number.

421001420340020 is an abundant number, since it is smaller than the sum of its proper divisors (582599165138380).

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

421001420340020 is a wasteful number, since it uses less digits than its factorization.

421001420340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117226297 (or 117226295 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 421001420340020 its reverse (20043024100124), we get a palindrome (441044444440144).

The spelling of 421001420340020 in words is "four hundred twenty-one trillion, one billion, four hundred twenty million, three hundred forty thousand, twenty".