121320351 has 6 divisors (see below), whose sum is σ = 175240520. Its totient is φ = 80880228.

The previous prime is 121320349. The next prime is 121320359. The reversal of 121320351 is 153023121.

It is not a de Polignac number, because 121320351 - 2¹ = 121320349 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 (121320359) 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, 6740011 + ... + 6740028.

Almost surely, 2^121320351 is an apocalyptic number.

121320351 is a deficient number, since it is larger than the sum of its proper divisors (53920169).

121320351 is a wasteful number, since it uses less digits than its factorization.

121320351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13480045 (or 13480042 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 121320351 is about 11014.5517838903. The cubic root of 121320351 is about 495.0448566635.

Adding to 121320351 its reverse (153023121), we get a palindrome (274343472).

The spelling of 121320351 in words is "one hundred twenty-one million, three hundred twenty thousand, three hundred fifty-one".