121331111113 has 8 divisors (see below), whose sum is σ = 124440369480. Its totient is φ = 118228993920.

The previous prime is 121331111059. The next prime is 121331111173. The reversal of 121331111113 is 311111133121.

It can be written as a sum of positive squares in 4 ways, for example, as 10063500489 + 111267610624 = 100317^2 + 333568^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121331111113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121331111173) 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, 1750870 + ... + 1818847.

It is an arithmetic number, because the mean of its divisors is an integer number (15555046185).

Almost surely, 2^121331111113 is an apocalyptic number.

It is an amenable number.

121331111113 is a deficient number, since it is larger than the sum of its proper divisors (3109258367).

121331111113 is an equidigital number, since it uses as much as digits as its factorization.

121331111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570587.

The product of its digits is 54, while the sum is 19.

Adding to 121331111113 its reverse (311111133121), we get a palindrome (432442244234).

The spelling of 121331111113 in words is "one hundred twenty-one billion, three hundred thirty-one million, one hundred eleven thousand, one hundred thirteen".