12120021002 has 16 divisors (see below), whose sum is σ = 18396996072. Its totient is φ = 5988116160.

The previous prime is 12120020993. The next prime is 12120021007. The reversal of 12120021002 is 20012002121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3110404441 + 9009616561 = 55771^2 + 94919^2 .

It is not an unprimeable number, because it can be changed into a prime (12120021007) 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, 49793 + ... + 163460.

Almost surely, 2^12120021002 is an apocalyptic number.

12120021002 is a deficient number, since it is larger than the sum of its proper divisors (6276975070).

12120021002 is a wasteful number, since it uses less digits than its factorization.

12120021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213593.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12120021002 its reverse (20012002121), we get a palindrome (32132023123).

The spelling of 12120021002 in words is "twelve billion, one hundred twenty million, twenty-one thousand, two".