12021462134545 has 8 divisors (see below), whose sum is σ = 14425802315496. Its totient is φ = 9617137871616.

The previous prime is 12021462134489. The next prime is 12021462134611. The reversal of 12021462134545 is 54543126412021.

It can be written as a sum of positive squares in 4 ways, for example, as 193867612416 + 11827594522129 = 440304^2 + 3439127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12021462134545 - 2¹¹ = 12021462132497 is a prime.

It is a super-3 number, since 3×12021462134545³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021462134498 and 12021462134507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249682 + ... + 5394811.

It is an arithmetic number, because the mean of its divisors is an integer number (1803225289437).

Almost surely, 2^{12021462134545} is an apocalyptic number.

It is an amenable number.

12021462134545 is a deficient number, since it is larger than the sum of its proper divisors (2404340180951).

12021462134545 is an equidigital number, since it uses as much as digits as its factorization.

12021462134545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7959011.

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 12021462134545 its reverse (54543126412021), we get a palindrome (66564588546566).

The spelling of 12021462134545 in words is "twelve trillion, twenty-one billion, four hundred sixty-two million, one hundred thirty-four thousand, five hundred forty-five".