1213312211320 has 128 divisors (see below), whose sum is σ = 3158559982080. Its totient is φ = 415103040000.

The previous prime is 1213312211311. The next prime is 1213312211359. The reversal of 1213312211320 is 231122133121.

It is a super-2 number, since 2×1213312211320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1213312211291 and 1213312211300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365406 + ... + 1600045.

It is an arithmetic number, because the mean of its divisors is an integer number (24676249860).

Almost surely, 2^{1213312211320} is an apocalyptic number.

1213312211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213312211320 is an abundant number, since it is smaller than the sum of its proper divisors (1945247770760).

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

1213312211320 is a wasteful number, since it uses less digits than its factorization.

1213312211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965557 (or 1965553 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1213312211320 its reverse (231122133121), we get a palindrome (1444434344441).

The spelling of 1213312211320 in words is "one trillion, two hundred thirteen billion, three hundred twelve million, two hundred eleven thousand, three hundred twenty".