1310310121 has 4 divisors (see below), whose sum is σ = 1310443732. Its totient is φ = 1310176512.

The previous prime is 1310310107. The next prime is 1310310143. The reversal of 1310310121 is 1210130131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1210130131 = 7 ⋅172875733.

It can be written as a sum of positive squares in 2 ways, for example, as 646990096 + 663320025 = 25436^2 + 25755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310310121 - 2¹⁷ = 1310179049 is a prime.

It is a super-2 number, since 2×1310310121² = 3433825226390069282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1310310101) 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, 50820 + ... + 72133.

It is an arithmetic number, because the mean of its divisors is an integer number (327610933).

Almost surely, 2^1310310121 is an apocalyptic number.

It is an amenable number.

1310310121 is a deficient number, since it is larger than the sum of its proper divisors (133611).

1310310121 is a wasteful number, since it uses less digits than its factorization.

1310310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133610.

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

The square root of 1310310121 is about 36198.2060467090. The cubic root of 1310310121 is about 1094.2705179333.

Adding to 1310310121 its reverse (1210130131), we get a palindrome (2520440252).

The spelling of 1310310121 in words is "one billion, three hundred ten million, three hundred ten thousand, one hundred twenty-one".