1002001202 has 4 divisors (see below), whose sum is σ = 1503001806. Its totient is φ = 501000600.

The previous prime is 1002001193. The next prime is 1002001207. The reversal of 1002001202 is 2021002001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2021002001 = 4793 ⋅421657.

It can be written as a sum of positive squares in only one way, i.e., 990297961 + 11703241 = 31469^2 + 3421^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1002001202.

It is not an unprimeable number, because it can be changed into a prime (1002001207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250500299 + ... + 250500302.

Almost surely, 2^1002001202 is an apocalyptic number.

1002001202 is a deficient number, since it is larger than the sum of its proper divisors (501000604).

1002001202 is an equidigital number, since it uses as much as digits as its factorization.

1002001202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501000603.

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

The square root of 1002001202 is about 31654.4025689950. The cubic root of 1002001202 is about 1000.6666228486. Note that the first 4 decimals are identical.

Adding to 1002001202 its reverse (2021002001), we get a palindrome (3023003203).

It can be divided in two parts, 1002001 and 202, that multiplied together give a palindrome (202404202).

The spelling of 1002001202 in words is "one billion, two million, one thousand, two hundred two".