121211116 has 24 divisors (see below), whose sum is σ = 235808384. Its totient is φ = 54138240.

The previous prime is 121211113. The next prime is 121211137. The reversal of 121211116 is 611112121.

It is a self number, because there is not a number n which added to its sum of digits gives 121211116.

It is not an unprimeable number, because it can be changed into a prime (121211113) 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, 35985 + ... + 39208.

Almost surely, 2^121211116 is an apocalyptic number.

It is an amenable number.

121211116 is a deficient number, since it is larger than the sum of its proper divisors (114597268).

121211116 is a wasteful number, since it uses less digits than its factorization.

121211116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75241 (or 75239 counting only the distinct ones).

The product of its digits is 24, while the sum is 16.

The square root of 121211116 is about 11009.5919997064. The cubic root of 121211116 is about 494.8962350942.

Adding to 121211116 its reverse (611112121), we get a palindrome (732323237).

The spelling of 121211116 in words is "one hundred twenty-one million, two hundred eleven thousand, one hundred sixteen".