12201005251545 has 48 divisors (see below), whose sum is σ = 21469649019840. Its totient is φ = 5912326963840.

The previous prime is 12201005251507. The next prime is 12201005251549. The reversal of 12201005251545 is 54515250010221.

It is not a de Polignac number, because 12201005251545 - 2⁶ = 12201005251481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12201005251549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1362511 + ... + 5124299.

It is an arithmetic number, because the mean of its divisors is an integer number (447284354580).

Almost surely, 2^{12201005251545} is an apocalyptic number.

12201005251545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12201005251545 is a deficient number, since it is larger than the sum of its proper divisors (9268643768295).

12201005251545 is a wasteful number, since it uses less digits than its factorization.

12201005251545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763606 (or 3763595 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 12201005251545 its reverse (54515250010221), we get a palindrome (66716255261766).

The spelling of 12201005251545 in words is "twelve trillion, two hundred one billion, five million, two hundred fifty-one thousand, five hundred forty-five".