1243203022420 has 24 divisors (see below), whose sum is σ = 2610798876000. Its totient is φ = 497267393952.

The previous prime is 1243203022363. The next prime is 1243203022423. The reversal of 1243203022420 is 242203023421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243203022423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109470 + ... + 1580629.

It is an arithmetic number, because the mean of its divisors is an integer number (108783286500).

Almost surely, 2^{1243203022420} is an apocalyptic number.

1243203022420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243203022420 is an abundant number, since it is smaller than the sum of its proper divisors (1367595853580).

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

1243203022420 is a wasteful number, since it uses less digits than its factorization.

1243203022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726887 (or 1726885 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 1243203022420 its reverse (242203023421), we get a palindrome (1485406045841).

The spelling of 1243203022420 in words is "one trillion, two hundred forty-three billion, two hundred three million, twenty-two thousand, four hundred twenty".