12121330140520 has 32 divisors (see below), whose sum is σ = 27579430945800. Its totient is φ = 4794054166528.

The previous prime is 12121330140481. The next prime is 12121330140587. The reversal of 12121330140520 is 2504103312121.

It can be written as a sum of positive squares in 4 ways, for example, as 6987108902596 + 5134221237924 = 2643314^2 + 2265882^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1702430449 + ... + 1702437568.

Almost surely, 2^{12121330140520} is an apocalyptic number.

12121330140520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121330140520 is an abundant number, since it is smaller than the sum of its proper divisors (15458100805280).

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

12121330140520 is a wasteful number, since it uses less digits than its factorization.

12121330140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404868117 (or 3404868113 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 12121330140520 its reverse (2504103312121), we get a palindrome (14625433452641).

The spelling of 12121330140520 in words is "twelve trillion, one hundred twenty-one billion, three hundred thirty million, one hundred forty thousand, five hundred twenty".