1211001111210 has 512 divisors, whose sum is σ = 3476879769600. Its totient is φ = 266823797760.

The previous prime is 1211001111197. The next prime is 1211001111241. The reversal of 1211001111210 is 121111001121.

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 255 ways as a sum of consecutive naturals, for example, 4279155729 + ... + 4279156011.

It is an arithmetic number, because the mean of its divisors is an integer number (6790780800).

Almost surely, 2^{1211001111210} is an apocalyptic number.

1211001111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211001111210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738439884800).

1211001111210 is an abundant number, since it is smaller than the sum of its proper divisors (2265878658390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211001111210 is a wasteful number, since it uses less digits than its factorization.

1211001111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1211001111210 its reverse (121111001121), we get a palindrome (1332112112331).

The spelling of 1211001111210 in words is "one trillion, two hundred eleven billion, one million, one hundred eleven thousand, two hundred ten".