12121311430 has 16 divisors (see below), whose sum is σ = 21845278224. Its totient is φ = 4842542880.

The previous prime is 12121311413. The next prime is 12121311431. The reversal of 12121311430 is 3411312121.

It is a junction number, because it is equal to n+sod(n) for n = 12121311398 and 12121311407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121311431) 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, 739197 + ... + 755416.

It is an arithmetic number, because the mean of its divisors is an integer number (1365329889).

Almost surely, 2^12121311430 is an apocalyptic number.

12121311430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121311430 is a deficient number, since it is larger than the sum of its proper divisors (9723966794).

12121311430 is a wasteful number, since it uses less digits than its factorization.

12121311430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495431.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12121311430 its reverse (3411312121), we get a palindrome (15532623551).

The spelling of 12121311430 in words is "twelve billion, one hundred twenty-one million, three hundred eleven thousand, four hundred thirty".