1263310121 has 8 divisors (see below), whose sum is σ = 1331290944. Its totient is φ = 1196417200.

The previous prime is 1263310079. The next prime is 1263310123. The reversal of 1263310121 is 1210133621.

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

It is a cyclic number.

It is not a de Polignac number, because 1263310121 - 2¹⁸ = 1263047977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263310093 and 1263310102.

It is not an unprimeable number, because it can be changed into a prime (1263310123) 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, 269591 + ... + 274236.

It is an arithmetic number, because the mean of its divisors is an integer number (166411368).

Almost surely, 2^1263310121 is an apocalyptic number.

It is an amenable number.

1263310121 is a deficient number, since it is larger than the sum of its proper divisors (67980823).

1263310121 is a wasteful number, since it uses less digits than its factorization.

1263310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543951.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1263310121 is about 35543.0741636117. The cubic root of 1263310121 is about 1081.0272921381.

Adding to 1263310121 its reverse (1210133621), we get a palindrome (2473443742).

The spelling of 1263310121 in words is "one billion, two hundred sixty-three million, three hundred ten thousand, one hundred twenty-one".