20121230414545 has 32 divisors (see below), whose sum is σ = 26129842083072. Its totient is φ = 14786312631552.

The previous prime is 20121230414459. The next prime is 20121230414611. The reversal of 20121230414545 is 54541403212102.

It is a cyclic number.

It is not a de Polignac number, because 20121230414545 - 2²³ = 20121222025937 is a prime.

It is a super-3 number, since 3×20121230414545³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20121230414545.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12931387 + ... + 14403583.

It is an arithmetic number, because the mean of its divisors is an integer number (816557565096).

Almost surely, 2^{20121230414545} is an apocalyptic number.

It is an amenable number.

20121230414545 is a deficient number, since it is larger than the sum of its proper divisors (6008611668527).

20121230414545 is a wasteful number, since it uses less digits than its factorization.

20121230414545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473241.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 20121230414545 its reverse (54541403212102), we get a palindrome (74662633626647).

The spelling of 20121230414545 in words is "twenty trillion, one hundred twenty-one billion, two hundred thirty million, four hundred fourteen thousand, five hundred forty-five".