1220355213405 has 16 divisors (see below), whose sum is σ = 1958928506304. Its totient is φ = 648736058880.

The previous prime is 1220355213347. The next prime is 1220355213419. The reversal of 1220355213405 is 5043125530221.

It is not a de Polignac number, because 1220355213405 - 2²⁰ = 1220354164829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132498676 + ... + 132507885.

It is an arithmetic number, because the mean of its divisors is an integer number (122433031644).

Almost surely, 2^{1220355213405} is an apocalyptic number.

1220355213405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220355213405 is a deficient number, since it is larger than the sum of its proper divisors (738573292899).

1220355213405 is a wasteful number, since it uses less digits than its factorization.

1220355213405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265006876.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 1220355213405 in words is "one trillion, two hundred twenty billion, three hundred fifty-five million, two hundred thirteen thousand, four hundred five".