121313511 has 48 divisors (see below), whose sum is σ = 200712960. Its totient is φ = 72349200.

The previous prime is 121313473. The next prime is 121313519. The reversal of 121313511 is 115313121.

121313511 is a `hidden beast` number, since 121 + 31 + 3 + 511 = 666.

It is not a de Polignac number, because 121313511 - 2⁹ = 121312999 is a prime.

It is a super-2 number, since 2×121313511² = 29433935902294242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231696 + ... + 232218.

It is an arithmetic number, because the mean of its divisors is an integer number (4181520).

Almost surely, 2^121313511 is an apocalyptic number.

121313511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121313511 is a deficient number, since it is larger than the sum of its proper divisors (79399449).

121313511 is a wasteful number, since it uses less digits than its factorization.

121313511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 608 counting only the distinct ones).

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

The square root of 121313511 is about 11014.2412811777. The cubic root of 121313511 is about 495.0355530019.

Adding to 121313511 its reverse (115313121), we get a palindrome (236626632).

The spelling of 121313511 in words is "one hundred twenty-one million, three hundred thirteen thousand, five hundred eleven".