1213220223240 has 192 divisors, whose sum is σ = 3850234819200. Its totient is φ = 305785165824.

The previous prime is 1213220223227. The next prime is 1213220223251. The reversal of 1213220223240 is 423220223121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1213220223240.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18725221 + ... + 18789899.

It is an arithmetic number, because the mean of its divisors is an integer number (20053306350).

Almost surely, 2^{1213220223240} is an apocalyptic number.

1213220223240 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 1213220223240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1925117409600).

1213220223240 is an abundant number, since it is smaller than the sum of its proper divisors (2637014595960).

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

1213220223240 is a wasteful number, since it uses less digits than its factorization.

1213220223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65164 (or 65141 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1213220223240 its reverse (423220223121), we get a palindrome (1636440446361).

The spelling of 1213220223240 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, two hundred twenty-three thousand, two hundred forty".