121131311 has 8 divisors (see below), whose sum is σ = 138711840. Its totient is φ = 103619808.

The previous prime is 121131293. The next prime is 121131323. The reversal of 121131311 is 113131121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121131311 - 2¹⁴ = 121114927 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 (121131371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13436 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (17338980).

Almost surely, 2^121131311 is an apocalyptic number.

121131311 is a deficient number, since it is larger than the sum of its proper divisors (17580529).

121131311 is an equidigital number, since it uses as much as digits as its factorization.

121131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34513.

The product of its digits is 18, while the sum is 14.

The square root of 121131311 is about 11005.9670633707. The cubic root of 121131311 is about 494.7875985644.

Adding to 121131311 its reverse (113131121), we get a palindrome (234262432).

The spelling of 121131311 in words is "one hundred twenty-one million, one hundred thirty-one thousand, three hundred eleven".