12121031130 has 64 divisors (see below), whose sum is σ = 31575011328. Its totient is φ = 2960133120.

The previous prime is 12121031123. The next prime is 12121031137. The reversal of 12121031130 is 3113012121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12121031123) and next prime (12121031137).

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

It is not an unprimeable number, because it can be changed into a prime (12121031137) 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, 72831 + ... + 171890.

It is an arithmetic number, because the mean of its divisors is an integer number (493359552).

Almost surely, 2^12121031130 is an apocalyptic number.

12121031130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121031130 is an abundant number, since it is smaller than the sum of its proper divisors (19453980198).

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

12121031130 is a wasteful number, since it uses less digits than its factorization.

12121031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244871.

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

Adding to 12121031130 its reverse (3113012121), we get a palindrome (15234043251).

The spelling of 12121031130 in words is "twelve billion, one hundred twenty-one million, thirty-one thousand, one hundred thirty".