12131221030 has 16 divisors (see below), whose sum is σ = 22135325184. Its totient is φ = 4786015680.

The previous prime is 12131221019. The next prime is 12131221031. The reversal of 12131221030 is 3012213121.

It is a junction number, because it is equal to n+sod(n) for n = 12131220995 and 12131221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131221031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8308326 + ... + 8309785.

It is an arithmetic number, because the mean of its divisors is an integer number (1383457824).

Almost surely, 2^12131221030 is an apocalyptic number.

12131221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12131221030 is a deficient number, since it is larger than the sum of its proper divisors (10004104154).

12131221030 is a wasteful number, since it uses less digits than its factorization.

12131221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618191.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12131221030 its reverse (3012213121), we get a palindrome (15143434151).

The spelling of 12131221030 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-one thousand, thirty".