30011132220 has 72 divisors (see below), whose sum is σ = 84595209552. Its totient is φ = 7949606400.

The previous prime is 30011132131. The next prime is 30011132227. The reversal of 30011132220 is 2223111003.

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 30011132220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30011132227) 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, 1357092 + ... + 1379028.

It is an arithmetic number, because the mean of its divisors is an integer number (1174933466).

Almost surely, 2^30011132220 is an apocalyptic number.

30011132220 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 30011132220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42297604776).

30011132220 is an abundant number, since it is smaller than the sum of its proper divisors (54584077332).

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

30011132220 is a wasteful number, since it uses less digits than its factorization.

30011132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22251 (or 22098 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30011132220 its reverse (2223111003), we get a palindrome (32234243223).

The spelling of 30011132220 in words is "thirty billion, eleven million, one hundred thirty-two thousand, two hundred twenty".