12021020201 has 8 divisors (see below), whose sum is σ = 12219869640. Its totient is φ = 11823781248.

The previous prime is 12021020197. The next prime is 12021020239. The reversal of 12021020201 is 10202012021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1003368976 + 11017651225 = 31676^2 + 104965^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12021020201 - 2² = 12021020197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021020801) 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, 387566 + ... + 417431.

It is an arithmetic number, because the mean of its divisors is an integer number (1527483705).

Almost surely, 2^12021020201 is an apocalyptic number.

It is an amenable number.

12021020201 is a deficient number, since it is larger than the sum of its proper divisors (198849439).

12021020201 is a wasteful number, since it uses less digits than its factorization.

12021020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805243.

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

Adding to 12021020201 its reverse (10202012021), we get a palindrome (22223032222).

The spelling of 12021020201 in words is "twelve billion, twenty-one million, twenty thousand, two hundred one".