12021020801 has 2 divisors, whose sum is σ = 12021020802. Its totient is φ = 12021020800.

The previous prime is 12021020797. The next prime is 12021020813. The reversal of 12021020801 is 10802012021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7040049025 + 4980971776 = 83905^2 + 70576^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021020801 - 2² = 12021020797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021020801.

It is not a weakly prime, because it can be changed into another prime (12021020861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010510400 + 6010510401.

It is an arithmetic number, because the mean of its divisors is an integer number (6010510401).

Almost surely, 2^12021020801 is an apocalyptic number.

It is an amenable number.

12021020801 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021020801 is an equidigital number, since it uses as much as digits as its factorization.

12021020801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021020801 its reverse (10802012021), we get a palindrome (22823032822).

The spelling of 12021020801 in words is "twelve billion, twenty-one million, twenty thousand, eight hundred one".