121516212 has 12 divisors (see below), whose sum is σ = 283537856. Its totient is φ = 40505400.

The previous prime is 121516211. The next prime is 121516217. The reversal of 121516212 is 212615121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121516211) 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, 5063164 + ... + 5063187.

Almost surely, 2^121516212 is an apocalyptic number.

121516212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121516212 is an abundant number, since it is smaller than the sum of its proper divisors (162021644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121516212 is a wasteful number, since it uses less digits than its factorization.

121516212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126358 (or 10126356 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 121516212 is about 11023.4392092486. The cubic root of 121516212 is about 495.3111155086.

The spelling of 121516212 in words is "one hundred twenty-one million, five hundred sixteen thousand, two hundred twelve".