1211021224320 has 512 divisors, whose sum is σ = 4037541137280. Its totient is φ = 308461436928.

The previous prime is 1211021224291. The next prime is 1211021224321. The reversal of 1211021224320 is 234221201121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021224321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1519474162 + ... + 1519474958.

Almost surely, 2^{1211021224320} is an apocalyptic number.

1211021224320 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 1211021224320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018770568640).

1211021224320 is an abundant number, since it is smaller than the sum of its proper divisors (2826519912960).

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

1211021224320 is a wasteful number, since it uses less digits than its factorization.

1211021224320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1211021224320 its reverse (234221201121), we get a palindrome (1445242425441).

It can be divided in two parts, 1211021 and 224320, that added together give a palindrome (1435341).

The spelling of 1211021224320 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred twenty-four thousand, three hundred twenty".