1211111211002 has 96 divisors (see below), whose sum is σ = 2391214839552. Its totient is φ = 449469504000.

The previous prime is 1211111210927. The next prime is 1211111211007. The reversal of 1211111211002 is 2001121111121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1211111211007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9325352 + ... + 9454332.

It is an arithmetic number, because the mean of its divisors is an integer number (24908487912).

Almost surely, 2^{1211111211002} is an apocalyptic number.

1211111211002 is a deficient number, since it is larger than the sum of its proper divisors (1180103628550).

1211111211002 is a wasteful number, since it uses less digits than its factorization.

1211111211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129276 (or 129265 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211111211002 its reverse (2001121111121), we get a palindrome (3212232322123).

The spelling of 1211111211002 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred eleven thousand, two".