1212352540545 has 64 divisors (see below), whose sum is σ = 2010127601664. Its totient is φ = 623681399040.

The previous prime is 1212352540541. The next prime is 1212352540571. The reversal of 1212352540545 is 5450452532121.

It is not a de Polignac number, because 1212352540545 - 2² = 1212352540541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212352540541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9038107 + ... + 9171263.

It is an arithmetic number, because the mean of its divisors is an integer number (31408243776).

Almost surely, 2^{1212352540545} is an apocalyptic number.

1212352540545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212352540545 is a deficient number, since it is larger than the sum of its proper divisors (797775061119).

1212352540545 is a wasteful number, since it uses less digits than its factorization.

1212352540545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133422.

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 1212352540545 in words is "one trillion, two hundred twelve billion, three hundred fifty-two million, five hundred forty thousand, five hundred forty-five".