12312121002 has 16 divisors (see below), whose sum is σ = 24677431680. Its totient is φ = 4095175392.

The previous prime is 12312121001. The next prime is 12312121027. The reversal of 12312121002 is 20012121321.

It is not an unprimeable number, because it can be changed into a prime (12312121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213227 + ... + 2218782.

It is an arithmetic number, because the mean of its divisors is an integer number (1542339480).

Almost surely, 2^12312121002 is an apocalyptic number.

12312121002 is an abundant number, since it is smaller than the sum of its proper divisors (12365310678).

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

12312121002 is a wasteful number, since it uses less digits than its factorization.

12312121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432477.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12312121002 its reverse (20012121321), we get a palindrome (32324242323).

The spelling of 12312121002 in words is "twelve billion, three hundred twelve million, one hundred twenty-one thousand, two".