30121300 has 72 divisors (see below), whose sum is σ = 72182880. Its totient is φ = 10819200.

The previous prime is 30121271. The next prime is 30121303. The reversal of 30121300 is 312103.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152802 + ... + 152998.

It is an arithmetic number, because the mean of its divisors is an integer number (1002540).

Almost surely, 2^30121300 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36091440).

30121300 is an abundant number, since it is smaller than the sum of its proper divisors (42061580).

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

30121300 is a wasteful number, since it uses less digits than its factorization.

30121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 30121300 is about 5488.2875289110. The cubic root of 30121300 is about 311.1414733217.

Adding to 30121300 its reverse (312103), we get a palindrome (30433403).

The spelling of 30121300 in words is "thirty million, one hundred twenty-one thousand, three hundred".