121351 has 2 divisors, whose sum is σ = 121352. Its totient is φ = 121350.

The previous prime is 121349. The next prime is 121357. The reversal of 121351 is 153121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121351 - 2¹ = 121349 is a prime.

Together with 121349, it forms a pair of twin primes.

121351 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675 + 60676.

It is an arithmetic number, because the mean of its divisors is an integer number (60676).

2¹²¹³⁵¹ is an apocalyptic number.

121351 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351 is an equidigital number, since it uses as much as digits as its factorization.

121351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30, while the sum is 13.

The square root of 121351 is about 348.3547042886. The cubic root of 121351 is about 49.5086540663.

Adding to 121351 its reverse (153121), we get a palindrome (274472).

The spelling of 121351 in words is "one hundred twenty-one thousand, three hundred fifty-one".