1213455135320 has 16 divisors (see below), whose sum is σ = 2730274054560. Its totient is φ = 485382054112.

The previous prime is 1213455135317. The next prime is 1213455135337. The reversal of 1213455135320 is 235315543121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15168189152 + ... + 15168189231.

It is an arithmetic number, because the mean of its divisors is an integer number (170642128410).

Almost surely, 2^{1213455135320} is an apocalyptic number.

1213455135320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213455135320 is an abundant number, since it is smaller than the sum of its proper divisors (1516818919240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213455135320 is a wasteful number, since it uses less digits than its factorization.

1213455135320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30336378394 (or 30336378390 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 1213455135320 in words is "one trillion, two hundred thirteen billion, four hundred fifty-five million, one hundred thirty-five thousand, three hundred twenty".