121217706 has 24 divisors (see below), whose sum is σ = 264648384. Its totient is φ = 40096680.

The previous prime is 121217669. The next prime is 121217711. The reversal of 121217706 is 607712121.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 121217706.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23346 + ... + 28061.

It is an arithmetic number, because the mean of its divisors is an integer number (11027016).

Almost surely, 2^121217706 is an apocalyptic number.

121217706 is an abundant number, since it is smaller than the sum of its proper divisors (143430678).

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

121217706 is a wasteful number, since it uses less digits than its factorization.

121217706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51546 (or 51543 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 121217706 is about 11009.8912801172. The cubic root of 121217706 is about 494.9052037631.

Adding to 121217706 its reverse (607712121), we get a palindrome (728929827).

The spelling of 121217706 in words is "one hundred twenty-one million, two hundred seventeen thousand, seven hundred six".