1313167509721 has 8 divisors (see below), whose sum is σ = 1382367708800. Its totient is φ = 1243975922640.

The previous prime is 1313167509713. The next prime is 1313167509767. The reversal of 1313167509721 is 1279057613131.

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 1313167509721 - 2³ = 1313167509713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313167509791) 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, 1838826 + ... + 2451043.

It is an arithmetic number, because the mean of its divisors is an integer number (172795963600).

Almost surely, 2^{1313167509721} is an apocalyptic number.

It is an amenable number.

1313167509721 is a deficient number, since it is larger than the sum of its proper divisors (69200199079).

1313167509721 is a wasteful number, since it uses less digits than its factorization.

1313167509721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305999.

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 1313167509721 in words is "one trillion, three hundred thirteen billion, one hundred sixty-seven million, five hundred nine thousand, seven hundred twenty-one".