1313021051 has 2 divisors, whose sum is σ = 1313021052. Its totient is φ = 1313021050.

The previous prime is 1313020949. The next prime is 1313021053. The reversal of 1313021051 is 1501203131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1501203131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313021051 is a prime.

Together with 1313021053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1313021053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656510525 + 656510526.

It is an arithmetic number, because the mean of its divisors is an integer number (656510526).

Almost surely, 2^1313021051 is an apocalyptic number.

1313021051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313021051 is an equidigital number, since it uses as much as digits as its factorization.

1313021051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1313021051 is about 36235.6323389009. The cubic root of 1313021051 is about 1095.0246516972.

Adding to 1313021051 its reverse (1501203131), we get a palindrome (2814224182).

The spelling of 1313021051 in words is "one billion, three hundred thirteen million, twenty-one thousand, fifty-one".