1243220223420 has 120 divisors (see below), whose sum is σ = 4457174767584. Its totient is φ = 284164619904.

The previous prime is 1243220223379. The next prime is 1243220223437. The reversal of 1243220223420 is 243220223421.

1243220223420 is a `hidden beast` number, since 1 + 2 + 4 + 32 + 202 + 2 + 3 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54804367 + ... + 54827046.

Almost surely, 2^{1243220223420} is an apocalyptic number.

1243220223420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243220223420 is an abundant number, since it is smaller than the sum of its proper divisors (3213954544164).

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

1243220223420 is a wasteful number, since it uses less digits than its factorization.

1243220223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109631441 (or 109631430 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 1243220223420 its reverse (243220223421), we get a palindrome (1486440446841).

Subtracting from 1243220223420 its reverse (243220223421), we obtain a palindrome (999999999999).

The spelling of 1243220223420 in words is "one trillion, two hundred forty-three billion, two hundred twenty million, two hundred twenty-three thousand, four hundred twenty".