1211211113101 has 8 divisors (see below), whose sum is σ = 1321389904608. Its totient is φ = 1101043770000.

The previous prime is 1211211113081. The next prime is 1211211113113. The reversal of 1211211113101 is 1013111121121.

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 1211211113101 - 2³⁵ = 1176851374733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211211113131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2640135 + ... + 3064756.

It is an arithmetic number, because the mean of its divisors is an integer number (165173738076).

Almost surely, 2^{1211211113101} is an apocalyptic number.

1211211113101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211211113101 is a deficient number, since it is larger than the sum of its proper divisors (110178791507).

1211211113101 is a wasteful number, since it uses less digits than its factorization.

1211211113101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724203.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1211211113101 its reverse (1013111121121), we get a palindrome (2224322234222).

The spelling of 1211211113101 in words is "one trillion, two hundred eleven billion, two hundred eleven million, one hundred thirteen thousand, one hundred one".