121220343 has 6 divisors (see below), whose sum is σ = 175096064. Its totient is φ = 80813556.

The previous prime is 121220339. The next prime is 121220383. The reversal of 121220343 is 343022121.

It is not a de Polignac number, because 121220343 - 2² = 121220339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6734455 + ... + 6734472.

Almost surely, 2^121220343 is an apocalyptic number.

121220343 is a deficient number, since it is larger than the sum of its proper divisors (53875721).

121220343 is a wasteful number, since it uses less digits than its factorization.

121220343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468933 (or 13468930 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 121220343 is about 11010.0110354168. The cubic root of 121220343 is about 494.9087925005.

Adding to 121220343 its reverse (343022121), we get a palindrome (464242464).

The spelling of 121220343 in words is "one hundred twenty-one million, two hundred twenty thousand, three hundred forty-three".