121311351 has 20 divisors (see below), whose sum is σ = 207107472. Its totient is φ = 69320448.

The previous prime is 121311349. The next prime is 121311413. The reversal of 121311351 is 153113121.

121311351 is a `hidden beast` number, since 1 + 2 + 1 + 311 + 351 = 666.

It is not a de Polignac number, because 121311351 - 2¹ = 121311349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311341) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 106410 + ... + 107543.

Almost surely, 2^121311351 is an apocalyptic number.

121311351 is a deficient number, since it is larger than the sum of its proper divisors (85796121).

121311351 is an equidigital number, since it uses as much as digits as its factorization.

121311351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213972 (or 213963 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 121311351 is about 11014.1432258710. The cubic root of 121311351 is about 495.0326149309.

Adding to 121311351 its reverse (153113121), we get a palindrome (274424472).

The spelling of 121311351 in words is "one hundred twenty-one million, three hundred eleven thousand, three hundred fifty-one".