100030021020 has 72 divisors (see below), whose sum is σ = 303733606176. Its totient is φ = 26647489152.

The previous prime is 100030020989. The next prime is 100030021033. The reversal of 100030021020 is 20120030001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100030020993 and 100030021011.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 105727 + ... + 459606.

It is an arithmetic number, because the mean of its divisors is an integer number (4218522308).

Almost surely, 2^100030021020 is an apocalyptic number.

100030021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100030021020 is an abundant number, since it is smaller than the sum of its proper divisors (203703585156).

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

100030021020 is a wasteful number, since it uses less digits than its factorization.

100030021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566331 (or 566326 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 100030021020 its reverse (20120030001), we get a palindrome (120150051021).

The spelling of 100030021020 in words is "one hundred billion, thirty million, twenty-one thousand, twenty".