1303121131 has 4 divisors (see below), whose sum is σ = 1403361232. Its totient is φ = 1202881032.

The previous prime is 1303121117. The next prime is 1303121159. The reversal of 1303121131 is 1311213031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1311213031 = 3877 ⋅338203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1303121131 is a prime.

It is a super-2 number, since 2×1303121131² = 3396249364117438322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1303121191) 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, 50120031 + ... + 50120056.

It is an arithmetic number, because the mean of its divisors is an integer number (350840308).

Almost surely, 2^1303121131 is an apocalyptic number.

1303121131 is a deficient number, since it is larger than the sum of its proper divisors (100240101).

1303121131 is a wasteful number, since it uses less digits than its factorization.

1303121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100240100.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1303121131 is about 36098.7691064391. The cubic root of 1303121131 is about 1092.2656158044.

Adding to 1303121131 its reverse (1311213031), we get a palindrome (2614334162).

The spelling of 1303121131 in words is "one billion, three hundred three million, one hundred twenty-one thousand, one hundred thirty-one".