30710111220 has 144 divisors (see below), whose sum is σ = 94907659392. Its totient is φ = 8036524800.

The previous prime is 30710111183. The next prime is 30710111239. The reversal of 30710111220 is 2211101703.

It is a happy number.

It is a super-2 number, since 2×30710111220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30710111193 and 30710111202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2249134 + ... + 2262746.

It is an arithmetic number, because the mean of its divisors is an integer number (659080968).

Almost surely, 2^30710111220 is an apocalyptic number.

30710111220 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 30710111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47453829696).

30710111220 is an abundant number, since it is smaller than the sum of its proper divisors (64197548172).

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

30710111220 is a wasteful number, since it uses less digits than its factorization.

30710111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13862 (or 13857 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

Adding to 30710111220 its reverse (2211101703), we get a palindrome (32921212923).

The spelling of 30710111220 in words is "thirty billion, seven hundred ten million, one hundred eleven thousand, two hundred twenty".