111212312130 has 24 divisors (see below), whose sum is σ = 289152011772. Its totient is φ = 29656616544.

The previous prime is 111212312063. The next prime is 111212312131. The reversal of 111212312130 is 31213212111.

111212312130 is a `hidden beast` number, since 1 + 11 + 212 + 312 + 130 = 666.

111212312130 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 110535635961 + 676676169 = 332469^2 + 26013^2 .

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

It is not an unprimeable number, because it can be changed into a prime (111212312131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617846089 + ... + 617846268.

Almost surely, 2^111212312130 is an apocalyptic number.

111212312130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212312130 is an abundant number, since it is smaller than the sum of its proper divisors (177939699642).

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

111212312130 is a wasteful number, since it uses less digits than its factorization.

111212312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235692370 (or 1235692367 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111212312130 its reverse (31213212111), we get a palindrome (142425524241).

The spelling of 111212312130 in words is "one hundred eleven billion, two hundred twelve million, three hundred twelve thousand, one hundred thirty".