1213001505321 has 8 divisors (see below), whose sum is σ = 1639490619360. Its totient is φ = 797590030752.

The previous prime is 1213001505311. The next prime is 1213001505323. The reversal of 1213001505321 is 1235051003121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213001505321 - 2³¹ = 1210854021673 is a prime.

It is a super-2 number, since 2×1213001505321² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213001505291 and 1213001505300.

It is not an unprimeable number, because it can be changed into a prime (1213001505323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2769409611 + ... + 2769410048.

It is an arithmetic number, because the mean of its divisors is an integer number (204936327420).

Almost surely, 2^{1213001505321} is an apocalyptic number.

It is an amenable number.

1213001505321 is a deficient number, since it is larger than the sum of its proper divisors (426489114039).

1213001505321 is an equidigital number, since it uses as much as digits as its factorization.

1213001505321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5538819735.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 1213001505321 its reverse (1235051003121), we get a palindrome (2448052508442).

The spelling of 1213001505321 in words is "one trillion, two hundred thirteen billion, one million, five hundred five thousand, three hundred twenty-one".