12021020002 has 4 divisors (see below), whose sum is σ = 18031530006. Its totient is φ = 6010510000.

The previous prime is 12021019949. The next prime is 12021020129. The reversal of 12021020002 is 20002012021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20002012021 = 98731 ⋅202591.

It can be written as a sum of positive squares in only one way, i.e., 11687555881 + 333464121 = 108109^2 + 18261^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005254999 + ... + 3005255002.

Almost surely, 2^12021020002 is an apocalyptic number.

12021020002 is a deficient number, since it is larger than the sum of its proper divisors (6010510004).

12021020002 is an equidigital number, since it uses as much as digits as its factorization.

12021020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010510003.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12021020002 its reverse (20002012021), we get a palindrome (32023032023).

The spelling of 12021020002 in words is "twelve billion, twenty-one million, twenty thousand, two".