1200202001 has 2 divisors, whose sum is σ = 1200202002. Its totient is φ = 1200202000.

The previous prime is 1200201991. The next prime is 1200202007. The reversal of 1200202001 is 1002020021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198821376 + 1380625 = 34624^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200202001 - 2¹⁸ = 1199939857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200202001.

It is not a weakly prime, because it can be changed into another prime (1200202007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600101000 + 600101001.

It is an arithmetic number, because the mean of its divisors is an integer number (600101001).

Almost surely, 2^1200202001 is an apocalyptic number.

It is an amenable number.

1200202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200202001 is an equidigital number, since it uses as much as digits as its factorization.

1200202001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1200202001 is about 34643.9316619809. The cubic root of 1200202001 is about 1062.7181930854.

Adding to 1200202001 its reverse (1002020021), we get a palindrome (2202222022).

It can be divided in two parts, 1 and 200202001, that added together give a palindrome (200202002).

The spelling of 1200202001 in words is "one billion, two hundred million, two hundred two thousand, one".