30031121100 has 144 divisors (see below), whose sum is σ = 90053298720. Its totient is φ = 7717785600.

The previous prime is 30031121089. The next prime is 30031121173. The reversal of 30031121100 is 112113003.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5156190 + ... + 5162010.

It is an arithmetic number, because the mean of its divisors is an integer number (625370130).

Almost surely, 2^30031121100 is an apocalyptic number.

30031121100 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 30031121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45026649360).

30031121100 is an abundant number, since it is smaller than the sum of its proper divisors (60022177620).

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

30031121100 is a wasteful number, since it uses less digits than its factorization.

30031121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 30031121100 its reverse (112113003), we get a palindrome (30143234103).

The spelling of 30031121100 in words is "thirty billion, thirty-one million, one hundred twenty-one thousand, one hundred".