1211002211002 has 4 divisors (see below), whose sum is σ = 1816503316506. Its totient is φ = 605501105500.

The previous prime is 1211002210993. The next prime is 1211002211051. The reversal of 1211002211002 is 2001122001121.

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., 1068827213281 + 142174997721 = 1033841^2 + 377061^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302750552749 + ... + 302750552752.

Almost surely, 2^{1211002211002} is an apocalyptic number.

1211002211002 is a deficient number, since it is larger than the sum of its proper divisors (605501105504).

1211002211002 is an equidigital number, since it uses as much as digits as its factorization.

1211002211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605501105503.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211002211002 its reverse (2001122001121), we get a palindrome (3212124212123).

The spelling of 1211002211002 in words is "one trillion, two hundred eleven billion, two million, two hundred eleven thousand, two".