1311050421 has 32 divisors (see below), whose sum is σ = 2064021120. Its totient is φ = 819631872.

The previous prime is 1311050417. The next prime is 1311050441. The reversal of 1311050421 is 1240501131.

1311050421 is a `hidden beast` number, since 131 + 10 + 504 + 21 = 666.

It is not a de Polignac number, because 1311050421 - 2² = 1311050417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311050394 and 1311050403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311050441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124851 + ... + 134943.

It is an arithmetic number, because the mean of its divisors is an integer number (64500660).

Almost surely, 2^1311050421 is an apocalyptic number.

It is an amenable number.

1311050421 is a deficient number, since it is larger than the sum of its proper divisors (752970699).

1311050421 is a wasteful number, since it uses less digits than its factorization.

1311050421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10402 (or 10396 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1311050421 is about 36208.4302476647. The cubic root of 1311050421 is about 1094.4765597290.

Adding to 1311050421 its reverse (1240501131), we get a palindrome (2551551552).

The spelling of 1311050421 in words is "one billion, three hundred eleven million, fifty thousand, four hundred twenty-one".