1200021311002 has 4 divisors (see below), whose sum is σ = 1800031966506. Its totient is φ = 600010655500.

The previous prime is 1200021310997. The next prime is 1200021311009. The reversal of 1200021311002 is 2001131200021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 684426944601 + 515594366401 = 827301^2 + 718049^2 .

It is a super-2 number, since 2×1200021311002² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1200021311009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300005327749 + ... + 300005327752.

Almost surely, 2^{1200021311002} is an apocalyptic number.

1200021311002 is a deficient number, since it is larger than the sum of its proper divisors (600010655504).

1200021311002 is an equidigital number, since it uses as much as digits as its factorization.

1200021311002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600010655503.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1200021311002 its reverse (2001131200021), we get a palindrome (3201152511023).

The spelling of 1200021311002 in words is "one trillion, two hundred billion, twenty-one million, three hundred eleven thousand, two".