12121223130 has 80 divisors (see below), whose sum is σ = 33350685984. Its totient is φ = 3157146720.

The previous prime is 12121223129. The next prime is 12121223137. The reversal of 12121223130 is 3132212121.

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 (12121223137) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 139176 + ... + 208835.

Almost surely, 2^12121223130 is an apocalyptic number.

12121223130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121223130 is an abundant number, since it is smaller than the sum of its proper divisors (21229462854).

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

12121223130 is a wasteful number, since it uses less digits than its factorization.

12121223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348073 (or 348064 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12121223130 its reverse (3132212121), we get a palindrome (15253435251).

The spelling of 12121223130 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred thirty".