30121331100 has 144 divisors (see below), whose sum is σ = 101004535296. Its totient is φ = 6787872000.

The previous prime is 30121331063. The next prime is 30121331129. The reversal of 30121331100 is 113312103.

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

It is a self number, because there is not a number n which added to its sum of digits gives 30121331100.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 48090 + ... + 250110.

It is an arithmetic number, because the mean of its divisors is an integer number (701420384).

Almost surely, 2^30121331100 is an apocalyptic number.

30121331100 is a gapful number since it is divisible by the number (30) 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 30121331100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50502267648).

30121331100 is an abundant number, since it is smaller than the sum of its proper divisors (70883204196).

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

30121331100 is a wasteful number, since it uses less digits than its factorization.

30121331100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202116 (or 202109 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 30121331100 its reverse (113312103), we get a palindrome (30234643203).

The spelling of 30121331100 in words is "thirty billion, one hundred twenty-one million, three hundred thirty-one thousand, one hundred".