1223211001320 has 512 divisors, whose sum is σ = 5094661017600. Its totient is φ = 253614412800.

The previous prime is 1223211001303. The next prime is 1223211001349. The reversal of 1223211001320 is 231001123221.

1223211001320 is a `hidden beast` number, since 1 + 2 + 232 + 110 + 0 + 1 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1223211001293 and 1223211001302.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38320807 + ... + 38352713.

It is an arithmetic number, because the mean of its divisors is an integer number (9950509800).

Almost surely, 2^{1223211001320} is an apocalyptic number.

1223211001320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223211001320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2547330508800).

1223211001320 is an abundant number, since it is smaller than the sum of its proper divisors (3871450016280).

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

1223211001320 is a wasteful number, since it uses less digits than its factorization.

1223211001320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32406 (or 32396 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1223211001320 its reverse (231001123221), we get a palindrome (1454212124541).

The spelling of 1223211001320 in words is "one trillion, two hundred twenty-three billion, two hundred eleven million, one thousand, three hundred twenty".