111231211211101 has 4 divisors (see below), whose sum is σ = 111273649676604. Its totient is φ = 111188772745600.

The previous prime is 111231211211017. The next prime is 111231211211117. The reversal of 111231211211101 is 101112112132111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44537283987876 + 66693927223225 = 6673626^2 + 8166635^2 .

It is a cyclic number.

It is not a de Polignac number, because 111231211211101 - 2¹⁷ = 111231211080029 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 (111231211217101) 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, 21219228820 + ... + 21219234061.

It is an arithmetic number, because the mean of its divisors is an integer number (27818412419151).

Almost surely, 2^{111231211211101} is an apocalyptic number.

It is an amenable number.

111231211211101 is a deficient number, since it is larger than the sum of its proper divisors (42438465503).

111231211211101 is an equidigital number, since it uses as much as digits as its factorization.

111231211211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42438465502.

The product of its (nonzero) digits is 24, while the sum is 19.

Adding to 111231211211101 its reverse (101112112132111), we get a palindrome (212343323343212).

The spelling of 111231211211101 in words is "one hundred eleven trillion, two hundred thirty-one billion, two hundred eleven million, two hundred eleven thousand, one hundred one".