200421040420100 has 72 divisors (see below), whose sum is σ = 435157688187936. Its totient is φ = 80123443200000.

The previous prime is 200421040420049. The next prime is 200421040420157. The reversal of 200421040420100 is 1024040124002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1821110075 + ... + 1821220125.

It is an arithmetic number, because the mean of its divisors is an integer number (6043856780388).

Almost surely, 2^{200421040420100} is an apocalyptic number.

200421040420100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200421040420100 is an abundant number, since it is smaller than the sum of its proper divisors (234736647767836).

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

200421040420100 is a wasteful number, since it uses less digits than its factorization.

200421040420100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120117 (or 120110 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 200421040420100 its reverse (1024040124002), we get a palindrome (201445080544102).

The spelling of 200421040420100 in words is "two hundred trillion, four hundred twenty-one billion, forty million, four hundred twenty thousand, one hundred".