1305121252000 has 48 divisors (see below), whose sum is σ = 3206682925992. Its totient is φ = 522048499200.

The previous prime is 1305121251977. The next prime is 1305121252007. The reversal of 1305121252000 is 2521215031.

It can be written as a sum of positive squares in 4 ways, for example, as 389111468944 + 916009783056 = 623788^2 + 957084^2 .

It is not an unprimeable number, because it can be changed into a prime (1305121252007) 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, 163136157 + ... + 163144156.

Almost surely, 2^{1305121252000} is an apocalyptic number.

1305121252000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305121252000 is an abundant number, since it is smaller than the sum of its proper divisors (1901561673992).

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

1305121252000 is an equidigital number, since it uses as much as digits as its factorization.

1305121252000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326280338 (or 326280320 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 1305121252000 its reverse (2521215031), we get a palindrome (1307642467031).

The spelling of 1305121252000 in words is "one trillion, three hundred five billion, one hundred twenty-one million, two hundred fifty-two thousand".