111212121130 has 32 divisors (see below), whose sum is σ = 218395362240. Its totient is φ = 40437957120.

The previous prime is 111212121107. The next prime is 111212121187. The reversal of 111212121130 is 31121212111.

It is a happy 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, 2189077 + ... + 2239303.

It is an arithmetic number, because the mean of its divisors is an integer number (6824855070).

Almost surely, 2^111212121130 is an apocalyptic number.

111212121130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212121130 is a deficient number, since it is larger than the sum of its proper divisors (107183241110).

111212121130 is a wasteful number, since it uses less digits than its factorization.

111212121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70374.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111212121130 its reverse (31121212111), we get a palindrome (142333333241).

The spelling of 111212121130 in words is "one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred thirty".