30120100020 has 48 divisors (see below), whose sum is σ = 93706979520. Its totient is φ = 8032026528.

The previous prime is 30120099983. The next prime is 30120100063. The reversal of 30120100020 is 2000102103.

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 = 30120099975 and 30120100011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27888442 + ... + 27889521.

It is an arithmetic number, because the mean of its divisors is an integer number (1952228740).

Almost surely, 2^30120100020 is an apocalyptic number.

30120100020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30120100020 is an abundant number, since it is smaller than the sum of its proper divisors (63586879500).

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

30120100020 is a wasteful number, since it uses less digits than its factorization.

30120100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55777981 (or 55777973 counting only the distinct ones).

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

Adding to 30120100020 its reverse (2000102103), we get a palindrome (32120202123).

The spelling of 30120100020 in words is "thirty billion, one hundred twenty million, one hundred thousand, twenty".