1213554505420 has 24 divisors (see below), whose sum is σ = 2548513044000. Its totient is φ = 485412548352.

The previous prime is 1213554505391. The next prime is 1213554505439. The reversal of 1213554505420 is 245054553121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213554505420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550756 + ... + 1652404.

It is an arithmetic number, because the mean of its divisors is an integer number (106188043500).

Almost surely, 2^{1213554505420} is an apocalyptic number.

1213554505420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213554505420 is an abundant number, since it is smaller than the sum of its proper divisors (1334958538580).

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

1213554505420 is a wasteful number, since it uses less digits than its factorization.

1213554505420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156737 (or 1156735 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 1213554505420 in words is "one trillion, two hundred thirteen billion, five hundred fifty-four million, five hundred five thousand, four hundred twenty".