1315929797221 has 8 divisors (see below), whose sum is σ = 1417318310520. Its totient is φ = 1214564590272.

The previous prime is 1315929797213. The next prime is 1315929797249. The reversal of 1315929797221 is 1227979295131.

It can be written as a sum of positive squares in 4 ways, for example, as 167292452196 + 1148637345025 = 409014^2 + 1071745^2 .

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 1315929797221 - 2³ = 1315929797213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315929797201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5709226 + ... + 5935243.

It is an arithmetic number, because the mean of its divisors is an integer number (177164788815).

Almost surely, 2^{1315929797221} is an apocalyptic number.

It is an amenable number.

1315929797221 is a deficient number, since it is larger than the sum of its proper divisors (101388513299).

1315929797221 is a wasteful number, since it uses less digits than its factorization.

1315929797221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11653175.

The product of its digits is 4286520, while the sum is 58.

The spelling of 1315929797221 in words is "one trillion, three hundred fifteen billion, nine hundred twenty-nine million, seven hundred ninety-seven thousand, two hundred twenty-one".