1305403012212 has 96 divisors (see below), whose sum is σ = 3328695151488. Its totient is φ = 395741251584.

The previous prime is 1305403012183. The next prime is 1305403012213. The reversal of 1305403012212 is 2122103045031.

It is a super-2 number, since 2×1305403012212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305403012213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10792623 + ... + 10912905.

It is an arithmetic number, because the mean of its divisors is an integer number (34673907828).

Almost surely, 2^{1305403012212} is an apocalyptic number.

1305403012212 is a gapful number since it is divisible by the number (12) 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 1305403012212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664347575744).

1305403012212 is an abundant number, since it is smaller than the sum of its proper divisors (2023292139276).

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

1305403012212 is a wasteful number, since it uses less digits than its factorization.

1305403012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121329 (or 121327 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 1305403012212 its reverse (2122103045031), we get a palindrome (3427506057243).

The spelling of 1305403012212 in words is "one trillion, three hundred five billion, four hundred three million, twelve thousand, two hundred twelve".