121415131 has 4 divisors (see below), whose sum is σ = 121437792. Its totient is φ = 121392472.

The previous prime is 121415117. The next prime is 121415143. The reversal of 121415131 is 131514121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131514121 = 31 ⋅4242391.

It is a cyclic number.

It is not a de Polignac number, because 121415131 - 2¹³ = 121406939 is a prime.

It is a super-2 number, since 2×121415131² = 29483268071494322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121415099 and 121415108.

It is not an unprimeable number, because it can be changed into a prime (121415171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710 + ... + 15676.

It is an arithmetic number, because the mean of its divisors is an integer number (30359448).

Almost surely, 2^121415131 is an apocalyptic number.

121415131 is a deficient number, since it is larger than the sum of its proper divisors (22661).

121415131 is an equidigital number, since it uses as much as digits as its factorization.

121415131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22660.

The product of its digits is 120, while the sum is 19.

The square root of 121415131 is about 11018.8534340012. The cubic root of 121415131 is about 495.1737389650.

Adding to 121415131 its reverse (131514121), we get a palindrome (252929252).

The spelling of 121415131 in words is "one hundred twenty-one million, four hundred fifteen thousand, one hundred thirty-one".