1211210211101 has 8 divisors (see below), whose sum is σ = 1321417314624. Its totient is φ = 1101019288320.

The previous prime is 1211210211097. The next prime is 1211210211149. The reversal of 1211210211101 is 1011120121121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211210211101 - 2² = 1211210211097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211210211301) 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 7 ways as a sum of consecutive naturals, for example, 3888401 + ... + 4188326.

It is an arithmetic number, because the mean of its divisors is an integer number (165177164328).

Almost surely, 2^{1211210211101} is an apocalyptic number.

1211210211101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211210211101 is a deficient number, since it is larger than the sum of its proper divisors (110207103523).

1211210211101 is a wasteful number, since it uses less digits than its factorization.

1211210211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090371.

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

Adding to 1211210211101 its reverse (1011120121121), we get a palindrome (2222330332222).

The spelling of 1211210211101 in words is "one trillion, two hundred eleven billion, two hundred ten million, two hundred eleven thousand, one hundred one".