121212707 has 16 divisors (see below), whose sum is σ = 151694592. Its totient is φ = 94093920.

The previous prime is 121212701. The next prime is 121212709. The reversal of 121212707 is 707212121.

It is a cyclic number.

It is not a de Polignac number, because 121212707 - 2¹⁶ = 121147171 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (121212701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18488 + ... + 24170.

It is an arithmetic number, because the mean of its divisors is an integer number (9480912).

Almost surely, 2^121212707 is an apocalyptic number.

121212707 is a deficient number, since it is larger than the sum of its proper divisors (30481885).

121212707 is a wasteful number, since it uses less digits than its factorization.

121212707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5978.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 121212707 is about 11009.6642546446. The cubic root of 121212707 is about 494.8984003975.

Adding to 121212707 its reverse (707212121), we get a palindrome (828424828).

The spelling of 121212707 in words is "one hundred twenty-one million, two hundred twelve thousand, seven hundred seven".