30155121120 has 96 divisors (see below), whose sum is σ = 95292584352. Its totient is φ = 8015634432.

The previous prime is 30155121107. The next prime is 30155121121. The reversal of 30155121120 is 2112155103.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30155121121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49884 + ... + 250596.

It is an arithmetic number, because the mean of its divisors is an integer number (992631087).

Almost surely, 2^30155121120 is an apocalyptic number.

30155121120 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 30155121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47646292176).

30155121120 is an abundant number, since it is smaller than the sum of its proper divisors (65137463232).

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

30155121120 is a wasteful number, since it uses less digits than its factorization.

30155121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201044 (or 201036 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 30155121120 its reverse (2112155103), we get a palindrome (32267276223).

The spelling of 30155121120 in words is "thirty billion, one hundred fifty-five million, one hundred twenty-one thousand, one hundred twenty".