117211121 has 4 divisors (see below), whose sum is σ = 117913152. Its totient is φ = 116509092.

The previous prime is 117211109. The next prime is 117211123. The reversal of 117211121 is 121112711.

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 117211121 - 2¹⁸ = 116948977 is a prime.

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 117211121.

It is not an unprimeable number, because it can be changed into a prime (117211123) 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, 350765 + ... + 351098.

It is an arithmetic number, because the mean of its divisors is an integer number (29478288).

Almost surely, 2^117211121 is an apocalyptic number.

It is an amenable number.

117211121 is a deficient number, since it is larger than the sum of its proper divisors (702031).

117211121 is an equidigital number, since it uses as much as digits as its factorization.

117211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702030.

The product of its digits is 28, while the sum is 17.

The square root of 117211121 is about 10826.4084995902. The cubic root of 117211121 is about 489.3913322576.

Adding to 117211121 its reverse (121112711), we get a palindrome (238323832).

The spelling of 117211121 in words is "one hundred seventeen million, two hundred eleven thousand, one hundred twenty-one".