1213111133321 has 8 divisors (see below), whose sum is σ = 1229971449504. Its totient is φ = 1196304258240.

The previous prime is 1213111133207. The next prime is 1213111133329. The reversal of 1213111133321 is 1233311113121.

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 1213111133321 - 2²⁶ = 1213044024457 is a prime.

It is a super-2 number, since 2×1213111133321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213111133329) 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, 13314560 + ... + 13405361.

It is an arithmetic number, because the mean of its divisors is an integer number (153746431188).

Almost surely, 2^{1213111133321} is an apocalyptic number.

It is an amenable number.

1213111133321 is a deficient number, since it is larger than the sum of its proper divisors (16860316183).

1213111133321 is an equidigital number, since it uses as much as digits as its factorization.

1213111133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26720551.

The product of its digits is 324, while the sum is 23.

Adding to 1213111133321 its reverse (1233311113121), we get a palindrome (2446422246442).

The spelling of 1213111133321 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, one hundred thirty-three thousand, three hundred twenty-one".