421245100000 has 144 divisors (see below), whose sum is σ = 1041902126496. Its totient is φ = 167634880000.

The previous prime is 421245099953. The next prime is 421245100043. The reversal of 421245100000 is 1542124.

It is a congruent number.

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, 19689309 + ... + 19710691.

It is an arithmetic number, because the mean of its divisors is an integer number (7235431434).

Almost surely, 2^421245100000 is an apocalyptic number.

421245100000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421245100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520951063248).

421245100000 is an abundant number, since it is smaller than the sum of its proper divisors (620657026496).

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

421245100000 is an equidigital number, since it uses as much as digits as its factorization.

421245100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21615 (or 21587 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 421245100000 its reverse (1542124), we get a palindrome (421246642124).

The spelling of 421245100000 in words is "four hundred twenty-one billion, two hundred forty-five million, one hundred thousand".