1205211913345 has 16 divisors (see below), whose sum is σ = 1577976995520. Its totient is φ = 876381624000.

The previous prime is 1205211913307. The next prime is 1205211913357. The reversal of 1205211913345 is 5433191125021.

It is not a de Polignac number, because 1205211913345 - 2²³ = 1205203524737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1343610 + ... + 2053219.

It is an arithmetic number, because the mean of its divisors is an integer number (98623562220).

Almost surely, 2^{1205211913345} is an apocalyptic number.

It is an amenable number.

1205211913345 is a deficient number, since it is larger than the sum of its proper divisors (372765082175).

1205211913345 is a wasteful number, since it uses less digits than its factorization.

1205211913345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403296.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 1205211913345 in words is "one trillion, two hundred five billion, two hundred eleven million, nine hundred thirteen thousand, three hundred forty-five".