121321113 has 16 divisors (see below), whose sum is σ = 173360256. Its totient is φ = 75271680.

The previous prime is 121321097. The next prime is 121321127. The reversal of 121321113 is 311123121.

It is a happy number.

It is not a de Polignac number, because 121321113 - 2⁴ = 121321097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121321092 and 121321101.

It is not an unprimeable number, because it can be changed into a prime (121321133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21208 + ... + 26313.

It is an arithmetic number, because the mean of its divisors is an integer number (10835016).

Almost surely, 2^121321113 is an apocalyptic number.

It is an amenable number.

121321113 is a deficient number, since it is larger than the sum of its proper divisors (52039143).

121321113 is a wasteful number, since it uses less digits than its factorization.

121321113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47584.

The product of its digits is 36, while the sum is 15.

The square root of 121321113 is about 11014.5863744400. The cubic root of 121321113 is about 495.0458931024.

Adding to 121321113 its reverse (311123121), we get a palindrome (432444234).

It can be divided in two parts, 12 and 1321113, that added together give a triangular number (1321125 = T₁₆₂₅).

The spelling of 121321113 in words is "one hundred twenty-one million, three hundred twenty-one thousand, one hundred thirteen".