30111311220 has 48 divisors (see below), whose sum is σ = 87031408128. Its totient is φ = 7770660480.

The previous prime is 30111311203. The next prime is 30111311231. The reversal of 30111311220 is 2211311103.

It is a happy number.

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 30111311220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8092579 + ... + 8096298.

It is an arithmetic number, because the mean of its divisors is an integer number (1813154336).

Almost surely, 2^30111311220 is an apocalyptic number.

30111311220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30111311220 is an abundant number, since it is smaller than the sum of its proper divisors (56920096908).

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

30111311220 is a wasteful number, since it uses less digits than its factorization.

30111311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16188920 (or 16188918 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 30111311220 its reverse (2211311103), we get a palindrome (32322622323).

The spelling of 30111311220 in words is "thirty billion, one hundred eleven million, three hundred eleven thousand, two hundred twenty".