121131013 has 4 divisors (see below), whose sum is σ = 121205260. Its totient is φ = 121056768.

The previous prime is 121131011. The next prime is 121131019. The reversal of 121131013 is 310131121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310131121 = 193 ⋅1606897.

It can be written as a sum of positive squares in 2 ways, for example, as 33558849 + 87572164 = 5793^2 + 9358^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131013 - 2¹ = 121131011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121130984 and 121131002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34620 + ... + 37957.

It is an arithmetic number, because the mean of its divisors is an integer number (30301315).

Almost surely, 2^121131013 is an apocalyptic number.

It is an amenable number.

121131013 is a deficient number, since it is larger than the sum of its proper divisors (74247).

121131013 is an equidigital number, since it uses as much as digits as its factorization.

121131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74246.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 121131013 is about 11005.9535252517. The cubic root of 121131013 is about 494.7871928151.

Adding to 121131013 its reverse (310131121), we get a palindrome (431262134).

The spelling of 121131013 in words is "one hundred twenty-one million, one hundred thirty-one thousand, thirteen".