121331351 has 4 divisors (see below), whose sum is σ = 121575000. Its totient is φ = 121087704.

The previous prime is 121331347. The next prime is 121331381. The reversal of 121331351 is 153133121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121331351 - 2² = 121331347 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 (121331381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121076 + ... + 122073.

It is an arithmetic number, because the mean of its divisors is an integer number (30393750).

Almost surely, 2^121331351 is an apocalyptic number.

121331351 is a deficient number, since it is larger than the sum of its proper divisors (243649).

121331351 is an equidigital number, since it uses as much as digits as its factorization.

121331351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243648.

The product of its digits is 270, while the sum is 20.

The square root of 121331351 is about 11015.0511120013. The cubic root of 121331351 is about 495.0598179590.

Adding to 121331351 its reverse (153133121), we get a palindrome (274464472).

The spelling of 121331351 in words is "one hundred twenty-one million, three hundred thirty-one thousand, three hundred fifty-one".