1321321212315 has 96 divisors (see below), whose sum is σ = 2655817295040. Its totient is φ = 601855008768.

The previous prime is 1321321212287. The next prime is 1321321212347. The reversal of 1321321212315 is 5132121231231.

1321321212315 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 321 + 21 + 2 + 315 = 666.

It is not a de Polignac number, because 1321321212315 - 2¹² = 1321321208219 is a prime.

It is a super-2 number, since 2×1321321212315² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 539202 + ... + 1712711.

It is an arithmetic number, because the mean of its divisors is an integer number (27664763490).

Almost surely, 2^{1321321212315} is an apocalyptic number.

1321321212315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321321212315 is an abundant number, since it is smaller than the sum of its proper divisors (1334496082725).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321321212315 is a wasteful number, since it uses less digits than its factorization.

1321321212315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252013 (or 2252010 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 1321321212315 its reverse (5132121231231), we get a palindrome (6453442443546).

The spelling of 1321321212315 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-one million, two hundred twelve thousand, three hundred fifteen".