1013121361 has 4 divisors (see below), whose sum is σ = 1157852992. Its totient is φ = 868389732.

The previous prime is 1013121349. The next prime is 1013121379. The reversal of 1013121361 is 1631213101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1631213101 = 7 ⋅233030443.

It is not a de Polignac number, because 1013121361 - 2⁷ = 1013121233 is a prime.

It is a super-2 number, since 2×1013121361² = 2052829784228984642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013125361) 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, 72365805 + ... + 72365818.

It is an arithmetic number, because the mean of its divisors is an integer number (289463248).

Almost surely, 2^1013121361 is an apocalyptic number.

It is an amenable number.

1013121361 is a deficient number, since it is larger than the sum of its proper divisors (144731631).

1013121361 is an equidigital number, since it uses as much as digits as its factorization.

1013121361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144731630.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1013121361 is about 31829.5674020242. The cubic root of 1013121361 is about 1004.3547952300.

Adding to 1013121361 its reverse (1631213101), we get a palindrome (2644334462).

The spelling of 1013121361 in words is "one billion, thirteen million, one hundred twenty-one thousand, three hundred sixty-one".