421100203000020 has 24 divisors (see below), whose sum is σ = 1179080568400224. Its totient is φ = 112293387466656.

The previous prime is 421100202999997. The next prime is 421100203000027. The reversal of 421100203000020 is 20000302001124.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421100203000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509168358274 + ... + 3509168358393.

It is an arithmetic number, because the mean of its divisors is an integer number (49128357016676).

Almost surely, 2^{421100203000020} is an apocalyptic number.

It is an amenable number.

421100203000020 is an abundant number, since it is smaller than the sum of its proper divisors (757980365400204).

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

421100203000020 is a wasteful number, since it uses less digits than its factorization.

421100203000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018336716679 (or 7018336716677 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 421100203000020 its reverse (20000302001124), we get a palindrome (441100505001144).

The spelling of 421100203000020 in words is "four hundred twenty-one trillion, one hundred billion, two hundred three million, twenty", and thus it is an aban number.