1312224232420 has 24 divisors (see below), whose sum is σ = 2755694209464. Its totient is φ = 524885250816.

The previous prime is 1312224232409. The next prime is 1312224232421. The reversal of 1312224232420 is 242324222131.

It can be written as a sum of positive squares in 4 ways, for example, as 434600014564 + 877624217856 = 659242^2 + 936816^2 .

It is not an unprimeable number, because it can be changed into a prime (1312224232421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3218374 + ... + 3603106.

It is an arithmetic number, because the mean of its divisors is an integer number (114820592061).

Almost surely, 2^{1312224232420} is an apocalyptic number.

1312224232420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312224232420 is an abundant number, since it is smaller than the sum of its proper divisors (1443469977044).

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

1312224232420 is a wasteful number, since it uses less digits than its factorization.

1312224232420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555279 (or 555277 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1312224232420 its reverse (242324222131), we get a palindrome (1554548454551).

The spelling of 1312224232420 in words is "one trillion, three hundred twelve billion, two hundred twenty-four million, two hundred thirty-two thousand, four hundred twenty".