111211220101121 has 4 divisors (see below), whose sum is σ = 127098537258432. Its totient is φ = 95323902943812.

The previous prime is 111211220101063. The next prime is 111211220101127. The reversal of 111211220101121 is 121101022112111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111211220101121 - 2²⁶ = 111211152992257 is a prime.

It is a super-3 number, since 3×111211220101121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111211220101121.

It is not an unprimeable number, because it can be changed into a prime (111211220101127) 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 3 ways as a sum of consecutive naturals, for example, 7943658578645 + ... + 7943658578658.

It is an arithmetic number, because the mean of its divisors is an integer number (31774634314608).

Almost surely, 2^{111211220101121} is an apocalyptic number.

It is an amenable number.

111211220101121 is a deficient number, since it is larger than the sum of its proper divisors (15887317157311).

111211220101121 is an equidigital number, since it uses as much as digits as its factorization.

111211220101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15887317157310.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111211220101121 its reverse (121101022112111), we get a palindrome (232312242213232).

The spelling of 111211220101121 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred one thousand, one hundred twenty-one".