1211100211210 has 8 divisors (see below), whose sum is σ = 2179980380196. Its totient is φ = 484440084480.

The previous prime is 1211100211187. The next prime is 1211100211267. The reversal of 1211100211210 is 121120011121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1135863561361 + 75236649849 = 1065769^2 + 274293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 60555010551 + ... + 60555010570.

Almost surely, 2^{1211100211210} is an apocalyptic number.

1211100211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211100211210 is a deficient number, since it is larger than the sum of its proper divisors (968880168986).

1211100211210 is a wasteful number, since it uses less digits than its factorization.

1211100211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121110021128.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211100211210 its reverse (121120011121), we get a palindrome (1332220222331).

The spelling of 1211100211210 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred eleven thousand, two hundred ten".