101211111211 has 4 divisors (see below), whose sum is σ = 115669841392. Its totient is φ = 86752381032.

The previous prime is 101211111187. The next prime is 101211111289. The reversal of 101211111211 is 112111112101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112111112101 = 311 ⋅360485891.

It is a cyclic number.

It is not a de Polignac number, because 101211111211 - 2⁵ = 101211111179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101211111191 and 101211111200.

It is not an unprimeable number, because it can be changed into a prime (101211111511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7229365080 + ... + 7229365093.

It is an arithmetic number, because the mean of its divisors is an integer number (28917460348).

Almost surely, 2^101211111211 is an apocalyptic number.

101211111211 is a deficient number, since it is larger than the sum of its proper divisors (14458730181).

101211111211 is an equidigital number, since it uses as much as digits as its factorization.

101211111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14458730180.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 101211111211 its reverse (112111112101), we get a palindrome (213322223312).

The spelling of 101211111211 in words is "one hundred one billion, two hundred eleven million, one hundred eleven thousand, two hundred eleven".