111212310030 has 64 divisors (see below), whose sum is σ = 283004098560. Its totient is φ = 27873196544.

The previous prime is 111212310029. The next prime is 111212310037. The reversal of 111212310030 is 30013212111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 111212309991 and 111212310009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212310037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215047 + ... + 518333.

It is an arithmetic number, because the mean of its divisors is an integer number (4421939040).

Almost surely, 2^111212310030 is an apocalyptic number.

111212310030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212310030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141502049280).

111212310030 is an abundant number, since it is smaller than the sum of its proper divisors (171791788530).

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

111212310030 is a wasteful number, since it uses less digits than its factorization.

111212310030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304033.

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

Adding to 111212310030 its reverse (30013212111), we get a palindrome (141225522141).

The spelling of 111212310030 in words is "one hundred eleven billion, two hundred twelve million, three hundred ten thousand, thirty".