100420243220 has 24 divisors (see below), whose sum is σ = 230053648608. Its totient is φ = 36516452000.

The previous prime is 100420243219. The next prime is 100420243223. The reversal of 100420243220 is 22342024001.

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

It is a junction number, because it is equal to n+sod(n) for n = 100420243192 and 100420243201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100420243223) 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 7 ways as a sum of consecutive naturals, for example, 228227606 + ... + 228228045.

It is an arithmetic number, because the mean of its divisors is an integer number (9585568692).

Almost surely, 2^100420243220 is an apocalyptic number.

100420243220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100420243220 is an abundant number, since it is smaller than the sum of its proper divisors (129633405388).

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

100420243220 is a wasteful number, since it uses less digits than its factorization.

100420243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456455671 (or 456455669 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 100420243220 its reverse (22342024001), we get a palindrome (122762267221).

The spelling of 100420243220 in words is "one hundred billion, four hundred twenty million, two hundred forty-three thousand, two hundred twenty".