121221220214 has 8 divisors (see below), whose sum is σ = 181926886680. Its totient is φ = 60578924656.

The previous prime is 121221220213. The next prime is 121221220217. The reversal of 121221220214 is 412022122121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15837944 + ... + 15845595.

It is an arithmetic number, because the mean of its divisors is an integer number (22740860835).

Almost surely, 2^121221220214 is an apocalyptic number.

121221220214 is a deficient number, since it is larger than the sum of its proper divisors (60705666466).

121221220214 is a wasteful number, since it uses less digits than its factorization.

121221220214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31685454.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121221220214 its reverse (412022122121), we get a palindrome (533243342335).

The spelling of 121221220214 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred fourteen".