1221112130 has 16 divisors (see below), whose sum is σ = 2512002240. Its totient is φ = 418666992.

The previous prime is 1221112117. The next prime is 1221112133. The reversal of 1221112130 is 312111221.

It is a super-2 number, since 2×1221112130² = 2982229668066273800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1221112133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8722160 + ... + 8722299.

It is an arithmetic number, because the mean of its divisors is an integer number (157000140).

Almost surely, 2^1221112130 is an apocalyptic number.

1221112130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221112130 is an abundant number, since it is smaller than the sum of its proper divisors (1290890110).

1221112130 is a wasteful number, since it uses less digits than its factorization.

1221112130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17444473.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1221112130 is about 34944.4148613194. The cubic root of 1221112130 is about 1068.8543156846.

Adding to 1221112130 its reverse (312111221), we get a palindrome (1533223351).

Subtracting from 1221112130 its reverse (312111221), we obtain a palindrome (909000909).

The spelling of 1221112130 in words is "one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred thirty".