121206216 has 32 divisors (see below), whose sum is σ = 307542240. Its totient is φ = 39798528.

The previous prime is 121206179. The next prime is 121206223. The reversal of 121206216 is 612602121.

It is a junction number, because it is equal to n+sod(n) for n = 121206192 and 121206201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36081 + ... + 39296.

It is an arithmetic number, because the mean of its divisors is an integer number (9610695).

Almost surely, 2^121206216 is an apocalyptic number.

It is an amenable number.

121206216 is an abundant number, since it is smaller than the sum of its proper divisors (186336024).

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

121206216 is a wasteful number, since it uses less digits than its factorization.

121206216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75453 (or 75449 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 121206216 is about 11009.3694642336. The cubic root of 121206216 is about 494.8895662223.

Adding to 121206216 its reverse (612602121), we get a palindrome (733808337).

It can be divided in two parts, 12120 and 6216, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 121206216 in words is "one hundred twenty-one million, two hundred six thousand, two hundred sixteen".