1305312434220 has 24 divisors (see below), whose sum is σ = 3654874815984. Its totient is φ = 348083315776.

The previous prime is 1305312434183. The next prime is 1305312434221. The reversal of 1305312434220 is 224342135031.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1305312434221) 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, 10877603559 + ... + 10877603678.

It is an arithmetic number, because the mean of its divisors is an integer number (152286450666).

Almost surely, 2^{1305312434220} is an apocalyptic number.

1305312434220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305312434220 is an abundant number, since it is smaller than the sum of its proper divisors (2349562381764).

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

1305312434220 is a wasteful number, since it uses less digits than its factorization.

1305312434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21755207249 (or 21755207247 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 1305312434220 its reverse (224342135031), we get a palindrome (1529654569251).

The spelling of 1305312434220 in words is "one trillion, three hundred five billion, three hundred twelve million, four hundred thirty-four thousand, two hundred twenty".