12021021002 has 8 divisors (see below), whose sum is σ = 18033423876. Its totient is φ = 6009879712.

The previous prime is 12021020993. The next prime is 12021021007. The reversal of 12021021002 is 20012012021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9558777361 + 2462243641 = 97769^2 + 49621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12021021007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291203 + ... + 329910.

Almost surely, 2^12021021002 is an apocalyptic number.

12021021002 is a deficient number, since it is larger than the sum of its proper divisors (6012402874).

12021021002 is an equidigital number, since it uses as much as digits as its factorization.

12021021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630792.

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

Adding to 12021021002 its reverse (20012012021), we get a palindrome (32033033023).

The spelling of 12021021002 in words is "twelve billion, twenty-one million, twenty-one thousand, two".