100031223220 has 24 divisors (see below), whose sum is σ = 210074269608. Its totient is φ = 40010832000.

The previous prime is 100031223203. The next prime is 100031223223. The reversal of 100031223220 is 22322130001.

It can be written as a sum of positive squares in 4 ways, for example, as 29681087524 + 70350135696 = 172282^2 + 265236^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100031223194 and 100031223203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100031223223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468390 + ... + 647650.

It is an arithmetic number, because the mean of its divisors is an integer number (8753094567).

Almost surely, 2^100031223220 is an apocalyptic number.

100031223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100031223220 is an abundant number, since it is smaller than the sum of its proper divisors (110043046388).

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

100031223220 is a wasteful number, since it uses less digits than its factorization.

100031223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207171 (or 207169 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 100031223220 its reverse (22322130001), we get a palindrome (122353353221).

The spelling of 100031223220 in words is "one hundred billion, thirty-one million, two hundred twenty-three thousand, two hundred twenty".