1211021110211 has 48 divisors (see below), whose sum is σ = 1425673872000. Its totient is φ = 1017066637440.

The previous prime is 1211021110199. The next prime is 1211021110213. The reversal of 1211021110211 is 1120111201121.

It is a de Polignac number, because none of the positive numbers 2^k-1211021110211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211021110213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198883655 + ... + 198889743.

It is an arithmetic number, because the mean of its divisors is an integer number (29701539000).

Almost surely, 2^{1211021110211} is an apocalyptic number.

1211021110211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211021110211 is a deficient number, since it is larger than the sum of its proper divisors (214652761789).

1211021110211 is a wasteful number, since it uses less digits than its factorization.

1211021110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432 (or 6305 counting only the distinct ones).

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

Adding to 1211021110211 its reverse (1120111201121), we get a palindrome (2331132311332).

The spelling of 1211021110211 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred ten thousand, two hundred eleven".