1211210332211 has 16 divisors (see below), whose sum is σ = 1328094614880. Its totient is φ = 1095468756480.

The previous prime is 1211210332201. The next prime is 1211210332229. The reversal of 1211210332211 is 1122330121121.

It is a cyclic number.

It is not a de Polignac number, because 1211210332211 - 2²² = 1211206137907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211210332201) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1433675 + ... + 2116091.

It is an arithmetic number, because the mean of its divisors is an integer number (83005913430).

Almost surely, 2^{1211210332211} is an apocalyptic number.

1211210332211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211210332211 is a deficient number, since it is larger than the sum of its proper divisors (116884282669).

1211210332211 is a wasteful number, since it uses less digits than its factorization.

1211210332211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683254.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211210332211 its reverse (1122330121121), we get a palindrome (2333540453332).

The spelling of 1211210332211 in words is "one trillion, two hundred eleven billion, two hundred ten million, three hundred thirty-two thousand, two hundred eleven".