1211002002 has 40 divisors (see below), whose sum is σ = 3101193216. Its totient is φ = 346000248.

The previous prime is 1211001977. The next prime is 1211002007. The reversal of 1211002002 is 2002001121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1211002007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 532818 + ... + 535085.

Almost surely, 2^1211002002 is an apocalyptic number.

1211002002 is an abundant number, since it is smaller than the sum of its proper divisors (1890191214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211002002 is a wasteful number, since it uses less digits than its factorization.

1211002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067924 (or 1067915 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1211002002 is about 34799.4540474416. The cubic root of 1211002002 is about 1065.8962976418.

Adding to 1211002002 its reverse (2002001121), we get a palindrome (3213003123).

The spelling of 1211002002 in words is "one billion, two hundred eleven million, two thousand, two".