1211210110210 has 16 divisors (see below), whose sum is σ = 2180191117176. Its totient is φ = 484481173248.

The previous prime is 1211210110193. The next prime is 1211210110273. The reversal of 1211210110210 is 120110121121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 691630079449 + 519580030761 = 831643^2 + 720819^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2490394 + ... + 2936746.

Almost surely, 2^{1211210110210} is an apocalyptic number.

1211210110210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211210110210 is a deficient number, since it is larger than the sum of its proper divisors (968981006966).

1211210110210 is a wasteful number, since it uses less digits than its factorization.

1211210110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717717.

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

Adding to 1211210110210 its reverse (120110121121), we get a palindrome (1331320231331).

The spelling of 1211210110210 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred ten thousand, two hundred ten".